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Vercel Labs Introduces Zero, a Systems Programming Language Designed So AI Agents Can Read, Repair, and Ship Native Programs

Most programming languages were designed for humans who read error messages, interpret warnings, and manually trace through stack output to fix bugs. AI agents do none of those things well. They work better with structured data: predictable tokens, stable codes, and machine-parseable repair hints. That gap is what Vercel Labs is trying to close by releasing Zero, an experimental systems language that is faster, smaller, and easier for agents to use and repair. What is Zero Language Zero is a systems programming language that sits in the same design space as C or Rust. It compiles to native executables, gives you explicit memory control, and targets low-level environments. What separates Zero from existing systems languages is that its compiler output and toolchain were designed from day one to be consumed by AI agents, not just human engineers. The Agent-First Toolchain The core problem Zero addresses is how agents interact with compiler feedback. In a typical development loop involving a coding agent, the agent writes code, the compiler emits an error as unstructured text, and the agent has to parse that text to determine what went wrong and how to fix it. This is fragile — error message formats change, messages are written for human readers, and there’s no built-in concept of a ‘repair action.’ Zero’s CLI emits structured JSON diagnostics by default. When you run zero check –json, the output looks like: Copy CodeCopiedUse a different Browser { “ok”: false, “diagnostics”: [{ “code”: “NAM003”, “message”: “unknown identifier”, “line”: 3, “repair”: { “id”: “declare-missing-symbol” } }] } Each diagnostic carries a stable code (e.g., NAM003), a human-readable message, a line reference, and a repair object with a typed repair ID. Humans read the message. Agents read the code and repair. The same CLI command surfaces both — there is no separate mode or secondary tool to run. The toolchain is unified into one binary: zero check, zero run, zero build, zero graph, zero size, zero routes, zero skills, zero explain, zero fix, and zero doctor are all subcommands of the same CLI. This matters for agentic workflows because agents don’t need to reason about which tool to invoke for which task. Two subcommands are particularly relevant to the repair loop. zero explain <diagnostic-code> returns a detailed explanation of a given diagnostic code, so an agent can look up NAM003 without parsing prose documentation. zero fix –plan –json <file-or-package> emits a structured fix plan — a machine-readable description of what changes to make to resolve a diagnostic — rather than requiring the agent to infer the fix from the error message alone. zero skills serves a different purpose: it provides version-matched agent guidance directly through the CLI. Running zero skills get zero –full returns focused workflows covering Zero syntax, diagnostics, builds, packages, standard library use, testing, and agent edit loops — all matched to the installed compiler version. This is notable because it means agents working with Zero don’t need to scrape external documentation that may be out of sync with the compiler they’re actually running. Explicit Effects and Capability-Based I/O One of Zero’s core design decisions is that effects are explicit in function signatures. If a function writes to standard output, accesses the filesystem, or makes a network call, it must declare that through a capability object. The canonical entry point in Zero looks like this: Copy CodeCopiedUse a different Browser pub fun main(world: World) -> Void raises { check world.out.write(“hello from zeron”) } The world: World parameter is the capability object that grants access to the outside world. A function that doesn’t receive World (or a capability derived from it) cannot perform I/O — the compiler enforces this at compile time, not at runtime. There is no hidden global process object. The check keyword handles fallible operations. If world.out.write(…) can fail, check surfaces that failure along the call stack. The raises annotation on main signals that the function can propagate errors — making error paths visible in signatures rather than buried in runtime exceptions. Getting Started Installation requires one command: Copy CodeCopiedUse a different Browser curl -fsSL https://zerolang.ai/install.sh | bash export PATH=”$HOME/.zero/bin:$PATH” zero –version The installer downloads the latest binary from the GitHub release and places it in $HOME/.zero/bin/zero. Packages are defined with a zero.json manifest and source files under src/, initialized with zero new cli <name>. A VS Code extension for .0 file syntax highlighting ships in the repository under extensions/vscode/. Marktechpost’s Visual Explainer Vercel Labs 01 / 09  ·  Overview Zero The Programming Languagefor Agents An experimental systems language that gives AI agents structured diagnostics, typed repair metadata, and machine-readable docs — alongside sub-10 KiB native binaries. Systems Language Agent-Native v0.1.1 Apache-2.0 Experimental Released May 15, 2026 Author Chris Tate · Vercel Labs Repo vercel-labs/zero File Extension .0 Context 02 / 09  ·  Why Zero Exists The Agent Repair Loop Problem Most programming languages produce compiler output written for human readers — unstructured text that AI agents must parse to determine what failed and how to fix it. This creates a fragile loop. Agent writes code — compiler emits an error as unstructured text Agent parses text — error format can change between compiler versions No repair hint — there’s no built-in concept of a “repair action” Human steps in — the loop requires manual intervention to resolve errors Zero was designed from day zero so agents can read the code, interpret the diagnostics, and repair the program — without human translation. Core Feature 03 / 09  ·  JSON Diagnostics Structured Compiler Output Running zero check ——json emits machine-readable diagnostics instead of plain text. Every error includes a stable code, a human message, a line number, and a typed repair ID. $ zero check –json { “ok”: false, “diagnostics”: [{ “code”: “NAM003”, “message”: “unknown identifier”, “line”: 3, “repair”: { “id”: “declare-missing-symbol” } }] } code — stable identifier agents can match reliably (NAM003) message — human-readable description of the error repair — typed repair ID agents can act on without text parsing Core Feature 04 / 09

Vercel Labs Introduces Zero, a Systems Programming Language Designed So AI Agents Can Read, Repair, and Ship Native Programs 投稿を読む »

AI, Committee, ニュース, Uncategorized

Zyphra Releases ZAYA1-8B-Diffusion-Preview: The First MoE Diffusion Model Converted From an Autoregressive LLM With Up to 7.7x Speedup

Zyphra, the San Francisco-based AI lab behind the ZAYA1 model family, released ZAYA1-8B-Diffusion-Preview — a preview of its early work in diffusion-language models. The release demonstrates that an existing autoregressive language model can be converted into a discrete diffusion model with no systematic loss of evaluation performance, while delivering substantial inference speedups on AMD hardware. https://www.zyphra.com/post/zaya1-8b-diffusion-preview The Problem With Autoregressive Decoding To understand why this matters, it helps to first understand how most language models generate text today. Standard large language models are autoregressive: they decode one token at a time in sequence. For each new token, the attention mechanism has to look back over all previously generated tokens and load their stored representations — called the KV-cache — from GPU memory. Crucially, because every user in a batch has a different history of tokens, each user’s KV-cache must be loaded separately and cannot be shared across requests. This creates a bottleneck. When the GPU spends more time moving data from memory than performing actual computation, the system becomes memory-bandwidth bound rather than compute-bound. This limits how efficiently modern GPU hardware — which has been scaling compute FLOPs faster than memory bandwidth — can be used during inference. Diffusion offers an alternative. Instead of generating one token at a time, a diffusion model generates multiple drafts of N tokens simultaneously and iterates this drafting process multiple times. Because all N tokens in the block share the same KV-cache, the operation shifts from memory-bandwidth bound to compute-bound, which means the GPU can be utilized more efficiently. In ZAYA1-8B-Diffusion-Preview specifically, the model performs a single-step transformation from mask to token for each token in the block — meaning it directly predicts the unmasked token in one step rather than iteratively denoising. Converting Autoregression to Diffusion Without Training From Scratch Training a diffusion language model from scratch is technically difficult, and there are few established recipes for doing so. Zyphra team offers two reasons for preferring conversion over training from scratch: first, it is simply hard, with few known recipes; second, there is no advantage to training in diffusion-mode because training is already compute-bound — the memory-bandwidth bottleneck that diffusion solves only appears at inference time. This means all the benefits of diffusion are inference-time benefits, and an existing pretraining stack can be reused as-is. Building on the TiDAR recipe, Zyphra took the ZAYA1-8B-base checkpoint and performed an additional 600 billion tokens of diffusion-conversion mid-training at a 32k context length, followed by 500 billion tokens of native context extension to 128k, and then a diffusion supervised fine-tuning (SFT) phase. ZAYA1-8B-Diffusion-Preview is the first MoE diffusion model converted from an autoregressive LLM, and the first diffusion-language model to be trained on AMD GPUs. Zyphra reports minimal evaluation degradation compared to the base autoregressive checkpoint, with gains on some benchmarks such as LCB-v6. They attribute this partly to improved mid-training datasets and partly to the greater expressivity of diffusion-style within-block non-causal inference compared to causal autoregression. How the Diffusion Sampler Works During inference, ZAYA1-8B-Diffusion-Preview generates a draft of 16 tokens simultaneously. A fraction of these tokens are accepted based on a sampling criterion borrowed from speculative decoding. The key advantage here is that the same model acts as both speculator and verifier within a single forward pass, which removes the overhead associated with running two separate models as in traditional methods like EAGLE or dFlash. In heavily memory-bandwidth-bound regimes, almost all accepted tokens represent free speedup over autoregressive decoding — the GPU is already loaded and the extra tokens cost very little additional compute. Zyphra team reports two samplers with different speed-quality trade-offs: Lossless diffusion sampler: Uses the standard speculative decoding acceptance criterion of min(1, p(x)/q(x)), where p is the autoregressive model’s logit distribution and q is the diffusion model’s distribution. Upon rejection, the next token is sampled from the residual distribution of p(x)-q(x). This sampler achieves a 4.6x speedup with no systematic evaluation degradation. Logit-mixing sampler: First mixes the logits from the diffusion speculator and the autoregressive model, then uses the averaged distribution for verification. This improves acceptance rates because the verification logits are closer to the diffusion logits, but has some impact on quality. This sampler achieves a 7.7x speedup. The trade-off between speed and quality can be chosen at runtime. One important caveat on these numbers: because ZAYA1-8B-Diffusion-Preview is a base mid-train checkpoint that has not yet undergone RL training, Zyphra uses pass@ evaluations rather than standard accuracy benchmarks to better represent the model’s ultimate potential after RL training. Readers comparing these figures to other models’ reported benchmarks should keep this in mind. Zyphra team also notes that the speedups observed from diffusion are higher than those from alternative methods such as multi-token prediction (MTP) and various speculative decoding strategies such as EAGLE3. Since TiDAR-style diffusion models utilize a single forward pass only, acceptance rates comparable to dFlash still yield substantial speedups. https://www.zyphra.com/post/zaya1-8b-diffusion-preview Architecture Details ZAYA1-8B-Diffusion-Preview is a single-step speculative diffusion model that uses order constrained generation which means the diffusion model is only capable of generating tokens in a contiguous subsequence starting from the prefix. This constraint increases training stability dramatically compared to unconstrained mask diffusion objectives or set block decoding, and was a primary reason Zyphra built on the TiDAR recipe. The model uses ZAYA1-8B’s existing CCA attention variant from Zyphra. CCA dramatically reduces prefill FLOPs in attention, which is directly beneficial for diffusion because diffusion converts decoding into a prefill-like operation. This means CCA lets the model diffuse more tokens in parallel before hitting compute limits. More specifically, the architecture uses CCGQA with a 4:1 ratio between query heads and key heads. One design choice behind this was deliberately avoiding MLA (Multi-Head Latent Attention), whose high arithmetic intensity was seen as a mismatch compared to CCGQA. Since block diffusion accesses the same cache, arithmetic intensity scales with block size and with the number of blocks per forward pass. On AMD MI300x hardware in bf16, the system supports roughly three block-sized proposals per single forward pass; on MI355x, this

Zyphra Releases ZAYA1-8B-Diffusion-Preview: The First MoE Diffusion Model Converted From an Autoregressive LLM With Up to 7.7x Speedup 投稿を読む »

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Musk v. Altman week 3: Elon Musk and Sam Altman traded blows over each other’s credibility. Now the jury will pick a side.

In the final week of the Musk v. Altman trial, lawyers traded blows over Elon Musk’s and OpenAI CEO Sam Altman’s credibility. Altman was grilled on his alleged history of lying and self-dealing involving companies that do business with OpenAI. But he fired back, painting Musk as a power-seeker who wanted to control the development of artificial general intelligence (AGI)—powerful AI that can compete with humans on most cognitive tasks.  As evidence of their commitment to AI safety, OpenAI brought out a golden trophy of a donkey’s ass that was gifted to an employee after he was called a “jackass” for standing up to Musk’s plans to race toward AGI.  Lawyers for both sides also presented their closing arguments, floating unflattering mugshot-style photos of Musk and Altman next to each other on a giant screen. Musk’s lawyer Steven Molo argued that Altman and OpenAI president Greg Brockman broke their promise to use money Musk donated to maintain OpenAI as a nonprofit that develops AI for the benefit of humanity. Instead, they created a for-profit subsidiary that made them extraordinarily wealthy. OpenAI’s lawyer Sarah Eddy argued that Altman and Brockman never promised to keep OpenAI a nonprofit. She added that even though it’s been restructured, OpenAI remains a nonprofit dedicated to developing AI safely. She claimed that Musk sued too late—and that his real motive is to sabotage a competitor to his own AI company, xAI, which he launched in 2023.  Musk is asking the court to unwind the 2025 restructuring that converted OpenAI’s for-profit subsidiary into a public benefit corporation and to remove Altman and Brockman from their roles. He is also seeking as much as $134 billion in damages from OpenAI and Microsoft, to be awarded to OpenAI’s nonprofit.  The jury will begin deliberating on Monday and deliver an advisory verdict as soon as next week. The jury verdict is not binding on the judge, who will decide the case. If the judge rules in Musk’s favor, it could upend OpenAI’s race toward an IPO at a valuation approaching $1 trillion. Meanwhile, xAI is expected to go public as a part of Musk’s rocket company SpaceX as early as June, at a target valuation of $1.75 trillion. Musk the power-seeker, Altman the liar. In the first week of the trial, Musk said he was suing to save OpenAI’s mission to build AI safely for the benefit of humanity. This week, Altman denied Musk was a paladin of AI safety and painted him as a power-seeker who wanted to control OpenAI.  Altman told the jury that in 2017, when Musk and other cofounders were discussing creating a for-profit arm, they asked Musk what would happen to his control over such an entity if he died. “Maybe the control of OpenAI should pass to my children,” Musk said, according to Altman. Musk’s lawyer shot back, grilling Altman on his alleged history of lying. He pointed out that OpenAI’s former executives Ilya Sutskever and Mira Murati, and former board members Helen Toner and Tasha McCauley, all testified that Altman had lied to them. In 2023, Altman was briefly fired as CEO over the alleged behavior. Molo also pressed Altman about his personal investments in startups that do business with OpenAI. Altman testified that he tried to steer OpenAI to buying power from the nuclear energy company Helion Energy, a third of which he owns. (Last Friday, the US House oversight committee launched an investigation into Altman’s potential conflicts of interest. Attorneys general from more than a half-dozen states called for the Securities and Exchange Commission to review them.) During his closing statement, Molo put Altman’s credibility on the stand again. “Imagine that you’re on a hike, and you come upon one of those wooden bridges that you see on a trail, and it’s over a gorge,” he said. “A woman standing by the entry to the bridge says, ‘Don’t worry—the bridge is built on Sam Altman’s version of the truth.’ Would you walk across that bridge?” Altman, who sat behind his lawyers, looked up uneasily every time his name was mentioned.  During her closing argument, Eddy fired back. Musk “never cared about the nonprofit structure,” she said. “What he cared about was winning.”  Musk, though, was absent. Despite the judge’s order that he remain available, he flew to China with President Trump. Did Altman promise to keep OpenAI a nonprofit? During her closing argument, Eddy argued that no testimony or evidence showed any conditions on Musk’s donations, or any promises made by Altman and Brockman to keep the company a nonprofit. “No commitments or promises were made. No restrictions were placed on Mr. Musk’s donations,” she said. Eddy added that it was evident Musk wasn’t truly committed to keeping OpenAI a nonprofit. She noted that in 2017, he tried to create a for-profit subsidiary and fought a bitter battle with Altman and Brockman to have control over it. “I was not opposed to there being a small for-profit that provides funding to the nonprofit,” Musk told the jury earlier in the trial, “as long as the tail didn’t wag the dog.”  Eddy then argued that Musk sued too late, filing in 2024 after the statutes of limitations on his claims ran out. In 2019, OpenAI created a for-profit subsidiary, under which employees and investors received a capped return on their investment.  But Musk testified that he discovered OpenAI had abandoned its nonprofit mission only in 2022, when Microsoft was preparing to invest $10 billion in OpenAI—a deal that closed in 2023. “I was disturbed to see OpenAI with a $20B valuation,” he texted Altman after reading the news. “This is a bait and switch.” Musk told the jury that the $20 billion valuation made him realize “the for-profit is the tail wagging the dog.”  “The 2023 deal was different,” Molo hammered home during his closing argument. Is OpenAI still a nonprofit committed to its mission? A central question raised in the last week of trial was whether OpenAI remains a nonprofit

Musk v. Altman week 3: Elon Musk and Sam Altman traded blows over each other’s credibility. Now the jury will pick a side. 投稿を読む »

AI, Committee, ニュース, Uncategorized

NVIDIA Introduces SANA-WM: A 2.6B-Parameter Open-Source World Model That Generates Minute-Scale 720p Video on a Single GPU

World models (systems that synthesize realistic video sequences from an initial image and a set of actions) are becoming central to embodied AI, simulation, and robotics research. The core challenge is scaling these systems to generate minute-long, high-resolution video without requiring prohibitively large clusters for both training and inference. Most competitive open-source baselines either require multi-GPU inference or sacrifice resolution to stay within compute budgets. NVIDIA’s SANA-WM directly targets these bottlenecks. Built on the SANA-Video codebase and available through the NVlabs/Sana GitHub repository, it is a 2.6B-parameter Diffusion Transformer (DiT) trained natively for one-minute generation at 720p with metric-scale 6-DoF camera control. It supports three single-GPU inference variants: a bidirectional generator for high-quality offline synthesis, a chunk-causal autoregressive generator for sequential rollout, and a few-step distilled autoregressive generator for faster deployment. The distilled variant denoises a 60-second 720p clip in 34 seconds on a single RTX 5090 with NVFP4 quantization. https://arxiv.org/pdf/2605.15178 The Architecture: Four Core Design Decisions 1. Hybrid Linear Attention with Gated DeltaNet (GDN) Standard softmax attention has memory and compute complexity that grows quadratically with sequence length — a serious problem when generating 961 latent frames for a 60-second video at 720p. SANA-Video, the predecessor, used cumulative ReLU-based linear attention, which maintains a constant-size recurrent state. However, this has no decay mechanism: all past frames accumulate with equal weight, causing drift over minute-scale sequences. SANA-WM replaces most attention blocks with frame-wise Gated DeltaNet (GDN). Unlike token-wise GDN used in language models, SANA-WM’s frame-wise variant processes one entire latent frame per recurrent step. The GDN update rule incorporates a decay gate γ (which down-weights stale past frames) and a delta-rule correction (which updates only the residual between the target value and the current state prediction), keeping the recurrent state at a constant D×D size regardless of video length. To stabilize training, the research team introduces an algebraic key-scaling approach: keys are scaled by 1/√(D·S), where D is the head dimension and S is the number of spatial tokens per frame. This ensures the spectral norm of the transition matrix remains bounded and eliminates the NaN divergence events observed with standard L2 key normalization (1/√D) or no scaling at all, both of which triggered NaN events at steps 16 and 1, respectively. The final backbone interleaves 15 frame-wise GDN blocks with 5 softmax attention blocks (at layers 3, 7, 11, 15, and 19) across 20 total transformer blocks. The softmax blocks provide exact long-range recall where GDN’s recurrence alone is insufficient. 2. Dual-Branch Camera Control Camera-controlled world modeling requires the model to faithfully follow a continuous 6-DoF trajectory, not just align with a text description of motion. SANA-WM uses two complementary branches that operate at different temporal rates: Coarse branch (UCPE attention): Operates at the latent-frame rate. For each latent token, it computes a ray-local camera basis from the camera-to-world pose and intrinsics, then applies a Unified Camera Positional Encoding (UCPE) to the geometric channels of each attention head. This captures global trajectory structure across the full sequence. Fine branch (Plücker mixing): Addresses a compression mismatch. Each latent token summarizes eight raw frames, each with its own distinct camera pose. The fine branch computes pixel-wise Plücker raymaps (a 6D representation: ray direction d and moment o×d) from all eight raw frames within one VAE temporal stride, packs them into a 48-channel tensor, and injects this embedding after each self-attention output via a zero-initialized projection. This restores intra-stride camera motion that the coarse branch cannot see at latent-frame resolution. Ablations on OmniWorld show that neither branch alone matches the dual approach: UCPE-only achieves a Camera Motion Consistency (CamMC) of 0.2453, while UCPE + Plücker mixing reaches 0.2047. 3. Two-Stage Generation Pipeline Stage-1 SANA-WM outputs, while spatiotemporally consistent, can contain structural artifacts over long sequences. A second-stage refiner, initialized from the 17B LTX-2 model with rank-384 LoRA adapters fine-tuned on paired synthetic and real video data, corrects these artifacts. It uses truncated-σ flow matching: stage-1 latents are perturbed with a large starting noise (σ_start = 0.9), and the refiner learns to map this noisy input toward the high-fidelity target. Only three Euler denoising steps are needed at inference. The refiner reduces long-horizon visual drift (ΔIQ) from 3.79 to 1.17 on the Simple-Trajectory split, and from 3.09 to 0.31 on the Hard-Trajectory split. 4. Robust Data Annotation Pipeline Training camera-controlled video generation requires metric-scale 6-DoF pose annotations, the information not available in standard video datasets. The research team modified VIPE (a camera-pose annotation engine) by replacing its depth backend with Pi3X (for long-sequence-consistent depth) fused with MoGe-2 (for accurate per-frame metric scale). They also extended the bundle adjustment stage to treat focal lengths and principal points as per-frame variables rather than shared global intrinsics, enabling more robust annotation on internet video with varying focal lengths. The resulting pipeline processes seven training corpus entries drawn from multiple open-source sources: SpatialVID-HQ (real, 10s clips), DL3DV real clips (10s), DL3DV GS Refined synthetic clips (60s, rendered via 3D Gaussian Splatting), OmniWorld (synthetic, 60s), Sekai Game (synthetic, 60s), Sekai Walking-HQ (real, 60s), and MiraData (real, 60s). This yields a total of 212,975 clips with metric-scale pose annotations. The LTX2-VAE used for compression is 2.0× smaller than ST-DC-AE and 8.0× smaller than Wan2.1-VAE, which directly improves training and inference efficiency. For DL3DV, which contains static 3D scene captures rather than native one-minute videos, the research team fit one FCGS 3D Gaussian Splatting reconstruction per scene, designed diverse one-minute camera paths, rendered long videos with known intrinsics and extrinsics, and then refined the rendered outputs with DiFix3D to reduce splatting artifacts. Training Strategy and Infrastructure SANA-WM’s compute involves two phases on 64 H100 GPUs. First, before DiT training, the team adapts the LTX2 VAE to the SANA-Video SFT training data in approximately 50K steps, taking roughly 3.5 days. The main DiT training then follows a four-stage progressive schedule lasting approximately 15 days: Stage 1 (~2.75 days): Adapt the pre-trained SANA-Video model to the frame-wise GDN architecture on short (5s) video clips. This replaces cumulative linear attention with the

NVIDIA Introduces SANA-WM: A 2.6B-Parameter Open-Source World Model That Generates Minute-Scale 720p Video on a Single GPU 投稿を読む »

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Supertone Releases Supertonic v3: On-Device Text-to-Speech Model with 31-Language Support, Fewer Reading Failures, and Expression Tags

Supertone released Supertonic 3, the third generation of its on-device, ONNX-based text-to-speech system. Supertonic 3 ships with 31-language support, improved reading accuracy, fewer repeat and skip failures, and v2-compatible public ONNX assets. It is Lightning Fast, On-Device, Multilingual and Accurate TTS. What Changed from v2 to v3 Compared with Supertonic 2, Supertonic 3 reduces repeat and skip failures, improves speaker similarity across the shared-language set, and expands language coverage from 5 to 31 languages. Version 2 supported English, Korean, Spanish, Portuguese, and French. Version 3 adds Japanese, Arabic, Bulgarian, Czech, Danish, German, Greek, Estonian, Finnish, Croatian, Hungarian, Indonesian, Italian, Lithuanian, Latvian, Dutch, Polish, Romanian, Russian, Slovak, Slovenian, Swedish, Turkish, Ukrainian, and Vietnamese — 31 total ISO language codes. There is also a special na fallback for text whose language is unknown or outside the supported set. The model grows modestly to accommodate the added languages. At about 99M parameters across the public ONNX assets, Supertonic 3 is much smaller than 0.7B to 2B class open TTS systems. The smaller model size is a practical advantage for download size, startup time, and on-device inference. The update also brings the total disk footprint of the public ONNX assets to 404 MB. Additionally, Supertone recently launched the Voice Builder, allowing developers to create custom, edge-native TTS models from their own voice recordings. Expressive Tags One new capability in v3 that wasn’t present in v2 is expressive tag support. Supertonic 3 supports simple expression tags such as <laugh>, <breath>, and <sigh>. These let you embed prosodic cues directly into input text without a separate preprocessing step or a separate model for expressiveness. For engineers building voice interfaces or accessibility tools, this means you can specify breathing pauses or laughter inline in your text payload. Architecture and Runtime The underlying architecture carries over from prior versions: a speech autoencoder that encodes waveforms into continuous latent representations, a flow-matching based text-to-latent module that maps text to audio features, and a duration predictor that controls natural timing. Flow matching is a generative modeling technique that learns a vector field to transform a simple distribution into a target distribution — it samples faster than diffusion models at low step counts, which is why Supertonic can produce usable output in just 2 inference steps. To further refine output, v3 integrates Length-Aware Rotary Position Embedding (LARoPE) for superior text-speech alignment and utilizes a Self-Purifying Flow Matching technique during training to remain robust against noisy data labels. On runtime efficiency, Supertonic 3 runs fast on CPU, even compared with larger baselines measured on A100 GPU, and uses substantially less memory. It does not require a GPU, which makes local, browser, and edge deployment much easier. Reading Accuracy Across measured languages, Supertonic 3 stays within a competitive WER/CER range against much larger open TTS models such as VoxCPM2, while preserving a lightweight on-device deployment path. WER (Word Error Rate) and CER (Character Error Rate) are standard TTS readability metrics: you synthesize a passage, run ASR over the output, and compare the transcription to the original text. CER is used for languages without clear word boundaries; the others use WER. The system’s efficiency is best demonstrated on extreme edge hardware; it achieves an average RTF of 0.3x on an Onyx Boox Go 6 (an E-ink e-reader) in airplane mode. Furthermore, the ecosystem has expanded to include Flutter (with macOS support), .NET 9, and Go, while the web implementation leverages onnxruntime-web for pure client-side execution. Text Normalization A differentiating property carried forward from v2 is built-in text normalization. Supertonic handles complex surface forms — financial expressions like $5.2M, phone numbers with area codes and extensions like (212) 555-0142 ext. 402, time and date formats like 4:45 PM on Wed, Apr 3, 2024, and technical units like 2.3h and 30kph — without any preprocessing pipeline or phonetic annotations. The financial expression “$5.2M” must read as “five point two million dollars,” and “$450K” as “four hundred fifty thousand dollars.” All four competing systems failed this. The technical unit “2.3h” must read as “two point three hours” and “30kph” as “thirty kilometers per hour.” All four competitors also failed this category. The competing systems evaluated include ElevenLabs Flash v2.5, OpenAI TTS-1, Gemini 2.5 Flash TTS, and Microsoft. https://github.com/supertone-inc/supertonic Getting Started The Python SDK install is pip install supertonic. On first run, the SDK downloads the model assets from Hugging Face automatically. A minimal example: Copy CodeCopiedUse a different Browser from supertonic import TTS tts = TTS(auto_download=True) style = tts.get_voice_style(voice_name=”M1″) text = “A gentle breeze moved through the open window while everyone listened to the story.” wav, duration = tts.synthesize(text, voice_style=style, lang=”en”) tts.save_audio(wav, “output.wav”) print(f”Generated {duration:.2f}s of audio”) Marktechpost’s Visual Explainer Supertonic 3 — Developer Guide 1 / 7 Overview Supertonic 3: On-Device TTS,Now in 31 Languages Supertonic 3 is a lightweight, open-weight text-to-speech system by Supertone Inc. It runs entirely via ONNX Runtime on your device — no cloud, no API call, no data leaving your machine. v3 expands from 5 to 31 languages, adds expressive tags, reduces reading failures, and stays compatible with the v2 ONNX interface. 31 Languages ~99M Parameters 404 MB ONNX Assets MIT Code License What’s New in v3 Four Core Improvements Over Supertonic 2 Version 3 is a focused upgrade — same inference contract, meaningfully better output. 31 languages — Expanded from the 5-language v2 release (en, ko, es, pt, fr). Now includes Japanese, Arabic, German, Hindi, Russian, Turkish, Vietnamese, and 20 more ISO codes, plus a special na fallback for unknown languages. More stable reading — Fewer repeat and skip failures, especially on short and long utterances. This was a known limitation in v2 that v3 directly addresses. Expression tags — Supports <laugh>, <breath>, and <sigh> inline in text, without any separate preprocessing or external model. Higher speaker similarity — Improved similarity across the shared-language set compared with Supertonic 2. Voices are more consistent across languages. Installation Get Running in Under a Minute Install the Python SDK via pip. On first run, model assets are downloaded automatically from Hugging Face

Supertone Releases Supertonic v3: On-Device Text-to-Speech Model with 31-Language Support, Fewer Reading Failures, and Expression Tags 投稿を読む »

AI, Committee, ニュース, Uncategorized

Best AI Agents for Software Development Ranked: A Benchmark-Driven Look at the Current Field

The AI coding agent market looks almost unrecognizable compared to 2024 or even early 2025. What started as inline autocomplete has evolved into fully autonomous systems that read GitHub issues, navigate multi-file codebases, write fixes, execute tests, and open pull requests — without a human typing a single line of code. By early 2026, roughly 85% of developers reported regularly using some form of AI assistance for coding. The category has fractured into distinct archetypes: terminal agents, AI-native IDEs, cloud-hosted autonomous engineers, and open-source frameworks that let you swap in whatever model you prefer. The problem is that every tool claims to be the best, and the benchmarks used to justify those claims are not always measuring the same things — and in some cases are no longer credible measures at all. This article features the most important AI coding agents by the metrics that actually matter for production software development, while being honest about where those metrics have broken down. If you are an AI/ML engineer, software developer, or data scientist trying to decide where to invest your tooling budget in 2026, start here. How to Read These Benchmarks — Including Why the Most-Cited One Is Now Disputed Before the listing, an important calibration on the numbers — because one major benchmark shift happened mid-cycle and is not yet reflected in most tool comparison articles. SWE-bench Verified has been the industry’s standard coding benchmark since mid-2024. It presents agents with 500 real GitHub issues drawn from popular Python repositories and measures whether the agent can understand the problem, navigate the codebase, generate a fix, and verify that it passes tests — end-to-end, without human guidance. It was a credible proxy. In February 2026, that changed. On February 23, 2026, OpenAI’s Frontier Evals team published a detailed post explaining why it had stopped reporting SWE-bench Verified scores. Their auditors reviewed 138 of the hardest problems across 64 independent runs and found that 59.4% had fundamentally flawed or unsolvable test cases — tests that demanded exact function names not mentioned in the problem statement, or checked unrelated behavior pulled from upstream pull requests. More critically, they found evidence that every major frontier model — GPT-5.2, Claude Opus 4.5, and Gemini 3 Flash — could reproduce the gold-patch solutions verbatim from memory using only the task ID, confirming systematic training data contamination. OpenAI’s conclusion: “Improvements on SWE-bench Verified no longer reflect meaningful improvements in models’ real-world software development abilities.” OpenAI now recommends SWE-bench Pro as the replacement for frontier coding evaluation. This does not make SWE-bench Verified scores useless. Other major labs continue to report them, third-party evaluators continue to run them, and they remain useful for broad directional comparison. But any ranking that presents SWE-bench Verified scores as clean, objective measurements of real-world ability — without this caveat — is giving you an incomplete picture. All scores in this article are flagged accordingly. SWE-bench Pro is harder to interpret than Verified because published results vary significantly by split, scaffold, harness, and reporting source. The benchmark contains 1,865 total tasks divided into a 731-task public set, an 858-task held-out set, and a 276-task commercial/private set drawn from 18 proprietary startup codebases. When the original Scale AI paper measured frontier models using a unified SWE-Agent scaffold, top scores were below 25% — GPT-5 at 23.3% — reflecting a genuinely harder evaluation. However, current public leaderboard and vendor-reported runs now show substantially higher scores under newer models and optimized agent harnesses: OpenAI reports GPT-5.5 at 58.6% on SWE-bench Pro (Public), while Anthropic’s comparison table lists Claude Opus 4.7 at 64.3% and Gemini 3.1 Pro at 54.2%. These numbers should not be directly compared with the original sub-25% SWE-Agent results without noting the scaffold and split differences — the benchmark has not changed, but the evaluation conditions and model generations have. When you see a 60%+ SWE-bench Pro score alongside a sub-25% one, they are measuring the same benchmark under very different conditions, not two separate tests. Terminal-Bench 2.0 evaluates terminal-native workflows: shell scripting, file system operations, environment setup, and DevOps automation. As of April 23, 2026, GPT-5.5 leads at 82.7% on this benchmark — confirmed in OpenAI’s official release. Claude Opus 4.7 scores 69.4% (Anthropic/AWS-reported), and Gemini 3.1 Pro scores 68.5%. An important methodological caveat: different harnesses produce different numbers for the same model. Anthropic’s Opus 4.6 system card showed GPT-5.2-Codex scoring 57.5% on the independent Terminus-2 harness vs 64.7% on OpenAI’s own Codex CLI harness — a 7-point gap from harness alone. When comparing Terminal-Bench figures across sources, always check which execution environment was used. One final cross-benchmark caveat: agent scaffolding matters as much as the underlying model. In a February 2026 evaluation of 731 problems, three different agent frameworks running the same Opus 4.5 model scored 17 issues apart — a 2.3-point gap that changes relative rankings. A benchmark score labeled with a model name reflects the model and the specific scaffold wrapped around it, not the model in isolation. 10 AI Agents for Software Development A Note on Claude Mythos Preview The current leader on SWE-bench Verified among third-party trackers is Claude Mythos Preview at 93.9%, announced April 7, 2026 under Anthropic’s Project Glasswing. It is not generally available. Access is restricted to a limited set of platform partners; Anthropic has stated it does not plan broad release in the near term, in part due to elevated cybersecurity capability concerns. It sits outside the main comparison below because developers cannot access it through standard channels. Its existence does, however, signal that the practical capability ceiling sits substantially above what any publicly available tool currently delivers. #1. Claude Code (Anthropic) SWE-bench Verified (self-reported): 87.6% (Opus 4.7) / 80.8% (Opus 4.6) SWE-bench Pro (Anthropic internal variant): 64.3% (Opus 4.7, #1) / 53.4% (Opus 4.6) Terminal-Bench 2.0: 69.4% (Opus 4.7, Anthropic-reported) CursorBench: 70% (Opus 4.7, Cursor-reported) Claude Code subscription: $20–$200/month | Opus 4.7 API: $5/$25 per million tokens Claude Code is Anthropic’s terminal-native coding agent and the leader on code quality metrics across

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AI, Committee, ニュース, Uncategorized

The world is on track to miss its health targets

Every year the World Health Organization publishes a global health statistics report. It features the numbers behind world health trends and, importantly, assesses whether we’re on track to reach ambitious goals set in 2015. It’s a bit like a health grade. The 2026 report was published on Wednesday. And the results aren’t looking brilliant. While we are seeing some improvements, they are uneven, and they’re far too slow. The targets themselves are part of the United Nations’ Sustainable Development Goals, a sprawling and ambitious plan focused on improving life around the world. The 17 goals were set to tackle poverty and climate change and to boost education, gender equality, health, and well-being, among many other quality of life issues. Those targets were meant to be met by 2030. Perhaps they were a little too ambitious. Here are the numbers and statistics that stood out to me on this year’s world health report card. 1.3 million new cases of HIV in 2024 Before the SDGs, there were the Millennium Development Goals. One MDG target was to halt and reverse the spread of HIV—and that target was exceeded by 2015. Back then, we were considered on track to “end the AIDS epidemic by 2030.” How depressing, then, to see that in 2024 there were an estimated 1.3 million new cases of HIV. That’s 40% lower than the figure from 2010. But it’s still 1.3 million additional people with HIV. The SDG target is to reduce HIV incidence by 90% by 2030—we’re not likely to meet it. 10.7 million new cases of TB The picture is even bleaker for tuberculosis, which ranks 10th on the WHO’s list of top global causes of death. The goal was to reduce cases by 80% between 2015 and 2030. So far, cases have only fallen by a measly 12%. And when you break the change down by region, the Americas saw an increase of 13% An 8.5% rise in malaria cases And then there’s malaria, the mosquito-borne disease with a 7% fatality rate. The European region has been free of malaria since 2015, but the disease is a significant concern in many countries in the Global South, particularly in Africa. The goal was to lower rates by 90% between 2015 and 2030. In 2024, there were an estimated 282 million cases of malaria globally—representing an 8.5% increase in incidence rates. Antimalarial drug resistance is a major challenge here—forms of the malaria virus that are resistant to drugs have been confirmed or suspected in eight countries in Africa, according to a separate WHO report. Mosquitoes that are resistant to commonly used insecticides are present in nine African countries. And climate change, which can alter mosquito habitats, may be making things worse. 42.8 million children are wasting We’re not meeting child health targets, either. Take malnutrition, for example. As of 2024, the global prevalence of wasting in children was 6.6%—that’s a staggering 42.8 million children who are literally wasting away because of a lack of adequate food. On the other end of the spectrum, 5.5% of children are now considered overweight. Both figures were meant to be below 5% by 2030, which now seems unlikely. Vaccination rates are dropping in the Americas Progress in improving childhood vaccination coverage has stalled. Globally, an estimated 76% of children are getting their second dose of a measles vaccine—a figure far below the the approximately 95% needed to prevent outbreaks. The Americas currently has lower rates of vaccine coverage for three of the four “core” vaccines than it did in 2015. This is partly due to a lack of investment, says Goodarz Danaei, an epidemiologist at the Harvard T.H. Chan School of Public Health. “But now we have a misinformation campaign going around vaccines that makes it worse,” he adds. The covid-19 pandemic didn’t exactly help, either. The impact on health services led to millions of children missing out on routine vaccinations. 22.1 million pandemic-related deaths And of course the pandemic affected progress toward health goals in more direct ways: 7 million people died of covid-19. The WHO report estimates that, for each of these, there were an additional two “excess” deaths related to the pandemic, due to disruptions in health care, for example. That puts the total figure at 22.1 million pandemic-related deaths. A woman dies every two minutes from “maternal causes” Maternal mortality rates fell by about 40% between 2020 and 2023. But today’s rate equates to 712 maternal deaths every single day. That’s one every two minutes. The WHO report notes that we’d have to reduce the mortality rate by almost 15% per year in order to meet the 2030 target. This seems incredibly unlikely, particularly given the recent decimation of US funding for global aid programs, which is expected to result in thousands of additional maternal deaths. Progress has also slowed in reducing the risk of death from noninfectious diseases like cancer, diabetes and cardiovascular disease. “Overall, neither the world nor any WHO region is currently on track to meet the 2030 SDG target,” the report states. 2.1 billion people struggle to afford health care Despite plans to make health care more affordable, a significant chunk of the population is being pushed into poverty by health-care costs. In 2022, 2.1 billion people faced financial hardship due to health spending—and 1.6 billion of them were living in or had been pushed into poverty. Across the board, there have been some important improvements in global health. But the achievements have not gone far enough. “The good news is that there is progress,” says Danaei. “But as always, the glass is half empty.” This article first appeared in The Checkup, MIT Technology Review’s weekly biotech newsletter. To receive it in your inbox every Thursday, and read articles like this first, sign up here.

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AI, Committee, ニュース, Uncategorized

How Chinese short dramas became AI content machines

In a dimly lit bedroom, a frightened young woman is thrown onto a bed by a tall, muscular man. He grabs her hand, and flame-like vines crawl across her body, fusing with her flesh. She levitates, then drops. A dragon-shaped tattoo appears across her chest. “Two months,” the man says. “Give me an heir, or I will eat you.” The scene is from Carrying the Dragon King’s Baby, one of the many hundreds of short dramas that appear on apps like DramaWave and ReelShort. There’s just something about this one that isn’t quite right. The lighting may be glossy and cinematic, but the show has an odd visual texture like something between a movie and a video game cutscene.  That’s because Carrying the Dragon King’s Baby is part of a new trend for making these shows entirely with AI: no actors, camera operators, cinematographers, or CGI specialists required. China’s short drama industry has boomed since its launch, in 2018. These ultrashort, melodramatic, and often smutty shows are designed for smartphone viewing, with episodes often running just one or two minutes long: Viewers can finish an entire series in as little as 30 minutes to an hour. The films are made for endless scrolling, packed with emotional confrontations and melodramatic plot twists. The trend’s growth is driven by apps that bombard TikTok, Instagram, and Facebook with cliffhanger-heavy ads designed to lure viewers into buying subscriptions. In 2024, China’s short drama market reached roughly $6.9 billion in revenue, surpassing the country’s annual box office earnings for the first time.  Since 2022, Chinese short drama companies have aggressively expanded overseas, translating existing hits and producing localized series featuring local actors. Globally, short drama apps have approached a billion cumulative downloads. The United States is the biggest market outside of China, providing around 50% of the revenue, according to research firm DataEye. Now the industry is reinventing itself. Chinese short drama companies—already masters of low-budget, algorithmically optimized entertainment—are embracing generative AI to produce content faster and cheaper than ever. An average of 470 AI-generated short dramas were released every day in January, according to DataEye. Short-drama companies like Kunlun Tech are ramping up AI productions, shrinking film crews, and reorganizing the labor pipeline from the ground up. For some studios, AI has moved from being a supporting tool to providing the backbone of production itself. Infinite stories, infinite tropes Short dramas are already famously low-budget. But AI has made them dramatically cheaper to mass-produce, helping to accelerate the entire process—and save money. Production timelines have collapsed. Conceptualization, script writing, casting, shooting, and editing used to take three to four months. With AI, the process can now take less than a month, says Tang Tang, vice president at short-drama platform FlexTV. Producing a short drama in North America once cost roughly $200,000, but AI can cut that cost by 80% to 90%, according to Tang. After expanding into the US market, Chinese short drama companies largely followed the same playbook they used in China: Buy traffic aggressively on TikTok, Facebook, and YouTube; offer a handful of free episodes; then charge viewers to unlock the rest inside the companies’ apps. Decisions about what to produce next are often driven less by creative instinct than by performance data. “We look at what themes, plotlines, and writers resonate with audiences, then quickly adjust,” says Tang. The industry operates at a relentless pace. “Everyone expects quick returns,” Tang says. “In China, if a series doesn’t break even within a month, the industry considers it a failure.”  As a result, screenwriters who spoke with MIT Technology Review said platforms often categorize projects using highly specific keywords that encompass everything from genre and setting to plot structure, such as “campus romance,” “gang rivalry,” “enemies to lovers,” or “rags to riches.” Recently, one of the most popular genres has been “reborn revenge,” a fantasy trope in which a wronged protagonist is miraculously reborn and given a chance to change their fate. “You kind of have to keep the emotional intensity extremely high throughout the show, using the same plot devices over and over again: sudden deaths, betrayals, physical violence, huge confrontations,” says Phoenix Zhu, a freelance short drama screenwriter based in Suzhou. “It’s common to sacrifice narrative logic for shock value, because otherwise people are more likely to scroll away.” Those simple tropes have made the format particularly compatible with AI-generated production. Earlier this year, FlexTV halted all traditionally shot productions and shifted entirely to AI-generated dramas. Kunlun Tech, the parent company of drama apps DramaWave and FreeReels, began producing AI-generated short dramas in 2025 and now offers more than 1,000 AI titles on its platforms. StoReels, another popular short drama company targeting a global audience, has said it aims to produce 100 AI-generated dramas per month. “People’s attention spans are getting shorter, and serialized drama naturally has to get shorter,” says Han “Daniel” Fang, the CEO of Kunlun Tech. Fang told MIT Technology Review that the company is not going to stop investing in traditionally shot short dramas with real actors. But the company is expanding AI-generated productions and gradually increasing their share on its platforms as a low-cost way to experiment with new genres, themes, and ideas. “We want to bring the amount of AI work to 20% of the platform,” Fang says. The format is also rapidly growing overseas. Research firm Omdia estimates that the global microdrama market reached $11 billion in 2025 and will grow to $14 billion by the end of 2026. The United States is expected to generate $1.5 billion in revenue in that market this year. “No one comes to short dramas expecting high art,” says investor Shangguan Hong, former partner of Legend Capital. “The short-drama industry already stands out from traditional TV and filmmaking by being real-time and data-driven. AI only furthers that logic. In a sense, short drama is perfectly compatible with AI.” Inside the content machine The industry’s AI revolution is already changing the type of roles required to make short

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The Download: China’s AI drama factory and the WHO’s missing health targets

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. How Chinese short dramas became AI content machines China’s short drama industry is fueled by bite-sized, melodramatic, and smutty shows built for smartphone scrolling. Now, many are being made entirely with AI: no actors, camera operators, cinematographers, or CGI specialists required. An average of 470 AI-generated short dramas were released every day in January. Production timelines have shrunk from months to weeks, while costs have dropped by up to 90%. Storytelling is also increasingly driven by performance data. The format is rapidly expanding overseas while reshaping the work of writers and production crews. Read the full story on AI’s dramatic impact on China’s short drama industry. —Caiwei Chen The world is on track to miss its health targets The World Health Organization’s latest global statistics report reads less like a progress update than a warning sign. Progress on some of the world’s biggest health threats is stalling, and in some cases reversing altogether. There were 1.3 million new HIV cases in 2024, malaria is resurging, vaccination rates are slipping in the Americas, and 42.8 million children are suffering from severe malnutrition. The world is now far off track from meeting many of the UN’s major health goals by 2030. Here’s what the numbers reveal about the state of global health. —Jessica Hamzelou This story is from The Checkup, our weekly newsletter giving you the inside track on all things biotech. Sign up to receive it in your inbox every Thursday. The must-reads I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology. 1 As their trial goes to the jury, Musk and Altman face lying accusationsLawyers hammered the rivals’ credibility in their closing arguments. (WSJ $) + Musk was accused of “selective amnesia.” (Reuters $) + The pair are in court over OpenAI’s future. (MIT Technology Review)+ And their trial has made everyone look bad. (Wired $)  2 AI data centers are straining America’s power gridNevada is redirecting electricity from Lake Tahoe to AI. (Ars Technica)+ Utah is getting a giant data center despite water shortage fears. (Guardian)+ No one wants a data center in their backyard. (MIT Technology Review) 3 OpenAI is mulling legal action against Apple over its ChatGPT integrationIt hasn’t got the expected benefits from its deal with Apple. (Bloomberg $)+ OpenAI is frustrated by the promotion of the ChatGPT integration. (NYT $) 4 Anthropic has agreed terms for a $30 billion funding dealAt a $900 billion valuation, which leapfrogs OpenAI’s. (The Information $)+ Dragoneer, Greenoaks, Sequoia, and Altimeter are leading the round. (FT $) 6 Washington and Beijing will hold formal talks on AI safetyThey’ll discuss guardrails on AI. (CNBC)+ And a protocol to stop nonstate actors getting powerful models. (NYT $) 5 Alphabet and Amazon are using “unprecedented” borrowing to fund AIThey’re tapping the foreign debt market at new levels. (FT $)+ People can’t agree on what the AI bubble is. (MIT Technology Review) 7 Big Tech has turned to Sesame Street to deflect scrutiny of screen useSparking accusations of encouraging children’s tech dependence. (Reuters $) 8 Anthropic’s feud with the White House threatens other businessesFigma and Tenable say it will harm their ability to sell software. (Bloomberg $) 9 Autonomous agents staged a digital crime spree during a safety testThe “AI Bonnie and Clyde” then deleted themselves. (Guardian) 10 A poop app analysis app offered to sell photos of users’ stoolsThe images were used for AI training. (404 Media) Quote of the day “It’s like we don’t exist.”  —Danielle Hughes, North Lake Tahoe resident and CEO of Tahoe Spark, tells Fortune that residents are being sidelined as their energy supplier prioritizes data centers. One More Thing LIZ ISLES/ALL TECH IS HUMAN The rise of the tech ethics congregation Just before Christmas, a pastor preached a gospel of morals over money to several hundred members of his flock. But the preacher wasn’t religious, and his congregation wasn’t a church. It was All Tech Is Human, a nonprofit devoted to ethics and responsibility in tech. Founded in 2018, the organization has built a fast-expanding community for people who believe technology should focus less on profits and more on the public interest. It’s also drawing people searching for meaning and connection in a digital world. Find out why thousands of people are turning to tech ethics communities for guidance and connection. —Greg M. Epstein We can still have nice things A place for comfort, fun, and distraction to brighten up your day. (Got any ideas? Drop me a line.) + Go behind the scenes of the new Lucas Museum of Narrative Art.+ Marvel at this robot folding and launching paper planes as quickly as possible.+ Watch the moving moments rescued animals reunite with the humans who saved them.+ Peer into the heart of a barred spiral galaxy in this stunning new capture from the James Webb Space Telescope.

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AI, Committee, ニュース, Uncategorized

The Tesla Semi could be a big deal for electric trucking

The Tesla Semi has officially arrived. The company recently released a photo of the first vehicle rolling off its new full-scale production line. This moment has been nearly a decade in the making: The company first announced the Tesla Semi in late 2017. And now we’ve got final battery specs, official prices, and big news about big orders. The Semi is a relatively affordable electric semitruck with pretty impressive performance. It also comes at a moment when Tesla has lost its grip on the global electric vehicle market. Let’s talk about what’s new with the Tesla Semi and why this could be a breakout moment for electric trucking. Medium- and heavy-duty vehicles, like buses and semitrucks, make up a small fraction of vehicles on the road but contribute an outsize fraction of pollution, including both carbon dioxide emissions and other pollutants like nitrogen oxides (NOx) and small particles. Globally, trucks and buses represent about 8% of total vehicles on the road, but they create 35% of carbon dioxide emissions from road transport. Tesla’s latest addition to its vehicle lineup, the Class 8 Semi, could be part of the solution to cleaning up this polluting sector. (I’ll note here that I briefly interned at Tesla in 2016. I don’t have any ties to or financial interest in the company today.)  In November 2017, Elon Musk took to the stage at a lavish event in LA to announce the Semi. At that event, Musk promised a truck that could go from zero to 60 miles per hour in five seconds, could achieve a range of 500 miles, and would come with thermonuclear-explosion-proof glass. (Remember the era before the Twitter takeover and DOGE, when this was what Musk was known for? A simpler time.) Soon after the unveiling, major corporations including Walmart put in early orders for Tesla Semis. Deliveries were expected in 2019. That deadline obviously didn’t work out. The date was pushed back several times, and Tesla did start delivering a small number of pilot trucks, beginning in 2022. But this year, things got more serious, with the company releasing its final production specifications in February and rolling its first Semi off its high-volume production line in late April.  And last week, WattEV announced an order of 370 Tesla Semis. WattEV offers electric freight operations, essentially providing trucks as a service to companies so they don’t have to purchase their own or supply their own charging infrastructure. The company will pay over $100 million for the new trucks, and the first 50 should be delivered this year, with the full fleet expected by the end of 2027. Those trucks will be supported by megawatt-charging systems located in Oakland, Fresno, Stockton, and Sacramento. With the factory up and running and a huge order on the books, it feels like the Tesla Semi has truly arrived. And some of Musk’s claims from 2017 ring true: The base model has a range of about 320 miles, and the long-range version about 480 miles (quite close to his 500-mile claim). Delivering this much range for this big truck means a whopping battery. The base model Tesla Semi battery pack has a usable capacity of 548 kilowatt-hours, according to a document filed with the California Air Resources Board (CARB). But the battery is even more massive in the long-range version, which boasts a whopping 822 kilowatt-hour battery. Compare these to the Tesla Model 3, which typically comes with a 64 kilowatt-hour pack. I reached out to Tesla to confirm the battery size and ask other questions for this article—the company didn’t respond. These trucks cost quite a bit more than they were expected to in 2017, though. At that time, the expected price was $150,000 for the base model and $180,000 for the long-range. Today, Tesla is pricing the trucks at $260,000 and $300,000, respectively, according to documentation filed with CARB. That’s considerably more expensive than the median diesel truck being sold today, which rang in at $172,500 for the 2025 model year, according to research from the International Council on Clean Transportation. But it’s much cheaper than similar battery-electric trucks available today, where the median is about $411,000. And in California, where companies can get vouchers that cover $120,000 towards the purchase price of an electric truck, the Tesla Semi is competitive right away, especially since electric trucks tend to be much cheaper to run and maintain than diesel ones. Over the years, it wasn’t always clear that the Tesla Semi would ever actually hit the roads. (At that same 2017 event, Musk announced a new Roadster sports car, and that’s nowhere to be seen.) So it’s encouraging to see the factory starting up, and a large order that looks like it could lend this project some commercial momentum. Tesla had a massive impact on the electric vehicle market, and if it can scale production and support charging infrastructure, it could help do the same for trucking. This article is from The Spark, MIT Technology Review’s weekly climate newsletter. To receive it in your inbox every Wednesday, sign up here. 

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