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Table of contents What problem is it actually solving? Does the sample-efficiency claim hold beyond toy problems? How does the evolutionary loop look in practice? What are the concrete results? How does this compare to AlphaEvolve and related systems? Summary FAQs — ShinkaEvolve Sakana AI has released ShinkaEvolve, an open-sourced framework that uses large language models (LLMs) as mutation operators in an evolutionary loop to evolve programs for scientific and engineering problems—while drastically cutting the number of evaluations needed to reach strong solutions. On the canonical circle-packing benchmark (n=26 in a unit square), ShinkaEvolve reports a new SOTA configuration using ~150 program evaluations, where prior systems typically burned thousands. The project ships under Apache-2.0, with a research report and public code. https://sakana.ai/shinka-evolve/ What problem is it actually solving? Most “agentic” code-evolution systems explore by brute force: they mutate code, run it, score it, and repeat—consuming enormous sampling budgets. ShinkaEvolve targets that waste explicitly with three interacting components: Adaptive parent sampling to balance exploration/exploitation. Parents are drawn from “islands” via fitness- and novelty-aware policies (power-law or weighted by performance and offspring counts) rather than always climbing the current best. Novelty-based rejection filtering to avoid re-evaluating near-duplicates. Mutable code segments are embedded; if cosine similarity exceeds a threshold, a secondary LLM acts as a “novelty judge” before execution. Bandit-based LLM ensembling so the system learns which model (e.g., GPT/Gemini/Claude/DeepSeek families) is yielding the biggest relative fitness jumps and routes future mutations accordingly (UCB1-style update on improvement over parent/baseline). Does the sample-efficiency claim hold beyond toy problems? The research team evaluates four distinct domains and shows consistent gains with small budgets: Circle packing (n=26): reaches an improved configuration in roughly 150 evaluations; the research team also validate with stricter exact-constraint checking. AIME math reasoning (2024 set): evolves agentic scaffolds that trace out a Pareto frontier (accuracy vs. LLM-call budget), outperforming hand-built baselines under limited query budgets / Pareto frontier of accuracy vs. calls and transferring to other AIME years and LLMs. Competitive programming (ALE-Bench LITE): starting from ALE-Agent solutions, ShinkaEvolve delivers ~2.3% mean improvement across 10 tasks and pushes one task’s solution from 5th → 2nd in an AtCoder leaderboard counterfactual. LLM training (Mixture-of-Experts): evolves a new load-balancing loss that improves perplexity and downstream accuracy at multiple regularization strengths vs. the widely-used global-batch LBL. https://sakana.ai/shinka-evolve/ How does the evolutionary loop look in practice? ShinkaEvolve maintains an archive of evaluated programs with fitness, public metrics, and textual feedback. For each generation: sample an island and parent(s); construct a mutation context with top-K and random “inspiration” programs; then propose edits via three operators—diff edits, full rewrites, and LLM-guided crossovers—while protecting immutable code regions with explicit markers. Executed candidates update both the archive and the bandit statistics that steer subsequent LLM/model selection. The system periodically produces a meta-scratchpad that summarizes recently successful strategies; those summaries are fed back into prompts to accelerate later generations. What are the concrete results? Circle packing: combined structured initialization (e.g., golden-angle patterns), hybrid global–local search (simulated annealing + SLSQP), and escape mechanisms (temperature reheating, ring rotations) discovered by the system—not hand-coded a priori. AIME scaffolds: three-stage expert ensemble (generation → critical peer review → synthesis) that hits the accuracy/cost sweet spot at ~7 calls while retaining robustness when swapped to different LLM backends. ALE-Bench: targeted engineering wins (e.g., caching kd-tree subtree stats; “targeted edge moves” toward misclassified items) that push scores without wholesale rewrites. MoE loss: adds an entropy-modulated under-use penalty to the global-batch objective; empirically reduces miss-routing and improves perplexity/benchmarks as layer routing concentrates. How does this compare to AlphaEvolve and related systems? AlphaEvolve demonstrated strong closed-source results but at higher evaluation counts. ShinkaEvolve reproduces and surpasses the circle-packing result with orders-of-magnitude fewer samples and releases all components open-source. The research team also contrast variants (single-model vs. fixed ensemble vs. bandit ensemble) and ablate parent selection and novelty filtering, showing each contributes to the observed efficiency. Summary ShinkaEvolve is an Apache-2.0 framework for LLM-driven program evolution that cuts evaluations from thousands to hundreds by combining fitness/novelty-aware parent sampling, embedding-plus-LLM novelty rejection, and a UCB1-style adaptive LLM ensemble. It sets a new SOTA on circle packing (~150 evals), finds stronger AIME scaffolds under strict query budgets, improves ALE-Bench solutions (~2.3% mean gain, 5th→2nd on one task), and discovers a new MoE load-balancing loss that improves perplexity and downstream accuracy. Code and report are public. FAQs — ShinkaEvolve 1) What is ShinkaEvolve?An open-source framework that couples LLM-driven program mutations with evolutionary search to automate algorithm discovery and optimization. Code and report are public. 2) How does it achieve higher sample-efficiency than prior evolutionary systems?Three mechanisms: adaptive parent sampling (explore/exploit balance), novelty-based rejection to avoid duplicate evaluations, and a bandit-based selector that routes mutations to the most promising LLMs. 3) What supports the results?It reaches state-of-the-art circle packing with ~150 evaluations; on AIME-2024 it evolves scaffolds under a 10-query cap per problem; it improves ALE-Bench solutions over strong baselines. 4) Where can I run it and what’s the license?The GitHub repo provides a WebUI and examples; ShinkaEvolve is released under Apache-2.0. Check out the Technical details, Paper and GitHub Page. Feel free to check out our GitHub Page for Tutorials, Codes and Notebooks. Also, feel free to follow us on Twitter and don’t forget to join our 100k+ ML SubReddit and Subscribe to our Newsletter. The post Sakana AI Released ShinkaEvolve: An Open-Source Framework that Evolves Programs for Scientific Discovery with Unprecedented Sample-Efficiency appeared first on MarkTechPost.

Choosing the right text representation is a critical first step in any natural language processing (NLP) project.

Shoplifters in the US could soon be chased down by drones The news: Flock Safety, whose drones were once reserved for police departments, is now offering them for private-sector security, the company has announced. Potential customers include businesses trying to curb shoplifting.  How it works: If the security team at a store sees shoplifters leave, they can activate a camera-equipped drone. “The drone follows the people. The people get in a car. You click a button and you track the vehicle with the drone, and the drone just follows the car,” says Keith Kauffman, a former police chief who now directs Flock’s drone program. The video feed of that drone might go to the company’s security team, but it could also be automatically transmitted directly to police departments.  The response: Flock’s expansion into private-sector security is “a logical step, but in the wrong direction,” says Rebecca Williams, senior strategist for the ACLU’s privacy and data governance unit. Read the full story.  —James O’Donnell  Read more of our stories about the latest in drone tech: + Why you’re about to see a lot more drones over America’s skies. + Meet Serhii “Flash” Beskrestnov, the radio-obsessed civilian shaping Ukraine’s drone defense. His work could help to determine the future of Ukraine, and wars far beyond it. + We examined four big trends that show what’s next for drone technology. + The defense tech startup Epirus has developed a cutting-edge, cost-efficient drone zapper that’s sparking the interest of the US military. Read our story about how it could change the future of war. The must-reads I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology. 1 TikTok US is being valued at $14 billion by Trump’s dealThat’s shockingly low for a fast-growing social media company. (FT $) + The deal is basically just Trump giving TikTok to his friends. (Vox $)+ Here’s what the sale means for you. (WP $) 2 Microsoft has stopped letting Israel use its technology for surveillanceThe system was used to collect millions of Palestinian civilians’ phone calls every day. (The Guardian) 3 There are more robots working in China than the rest of the world combinedIt’s a trend that’ll further cement its status as the world’s leading manufacturer. (NYT $)+ China’s EV giants are betting big on humanoid robots. (MIT Technology Review) 4 The inside story of what happened when DOGE came to townIf anything, this is even more grim and chaotic than you might imagine. (Wired $) 5 Instagram’s teen safety features are flawedResearchers tested 47 of these features, and found that only 8 were fully effective. (Reuters $)+ There’s growing concern among lawmakers about the risks of kids forming bonds with chatbots. (MIT Technology Review) 6 Brazil’s judicial system is adopting AI with gustoThe trouble is that rather than reducing the amount of work for judges and lawyers, AI seems to be increasing it. (Rest of World)+ Meet the early-adopter judges using AI. (MIT Technology Review) 7 Amazon is refunding $1.5 billion to Prime subscribersThe deal with the FTC lets it avoid a trial over claims it tricked consumers into signing up. (WP $) 8 These women are in love with AI Like it or not, these sorts of romances are becoming more common. (Slate $)+ It’s surprisingly easy to stumble into a relationship with an AI chatbot. (MIT Technology Review)  9 Scientists are improving how we measure nothingResearchers are developing a vacuum-measurement tool that could unlock exciting new possibilities for science. (IEEE Spectrum)+ This quantum radar could image buried objects. (MIT Technology Review) 10 Why does everything online feel so icky? Most of us will go to extreme lengths to avoid awkwardness IRL. On social media, it’s another matter entirely… (Vox $)+ China’s government has had enough of everyone being negative on its internet. (BBC) Quote of the day “AI machines—in quite a literal sense—appear to be saving the US economy right now. In the absence of tech-related spending, the US would be close to, or in, recession this year.” —George Saravelos, global head of FX research at Deutsche Bank, warns that the AI boom is unsustainable in a note to clients, Fortune reports. One more thing COURTESY OF OPENAI The two people shaping the future of OpenAI’s research —Will Douglas Heaven For the past couple of years, OpenAI has felt like a one-man brand. With his showbiz style and fundraising glitz, CEO Sam Altman overshadows all other big names on the firm’s roster. But Altman is not the one building the technology on which its reputation rests. That responsibility falls to OpenAI’s twin heads of research—chief research officer Mark Chen and chief scientist Jakub Pachocki. Between them, they share the role of making sure OpenAI stays one step ahead of powerhouse rivals like Google. I recently sat down with Chen and Pachocki for an exclusive conversation which covered everything from how they manage the inherent tension between research and product, to what they really mean when they talk about AGI, and what happened to OpenAI’s superalignment team. Read the full story. We can still have nice things + Wherever you are, this website helps you discover the most interesting bars nearby. + Take a tour of Norway’s lighthouses.+ Inside London’s flourishing underground rave scene.+ Meaningful changes rarely occur instantly. Here’s how they do happen.

Can safety keep up with real-time LLMs? Alibaba’s Qwen team thinks so, and it just shipped Qwen3Guard—a multilingual guardrail model family built to moderate prompts and streaming responses in-real-time. Qwen3Guard comes in two variants: Qwen3Guard-Gen (a generative classifier that reads full prompt/response context) and Qwen3Guard-Stream (a token-level classifier that moderates as text is generated). Both are released in 0.6B, 4B, and 8B parameter sizes and target global deployments with coverage for 119 languages and dialects. The models are open-sourced, with weights on Hugging Face and GitHub Repo. https://github.com/QwenLM/Qwen3Guard What’s new? Streaming moderation head: Stream attaches two lightweight classification heads to the final transformer layer—one monitors the user prompt, the other scores each generated token in real time as Safe / Controversial / Unsafe. This enables policy enforcement while a reply is being produced, instead of post-hoc filtering. Three-tier risk semantics: Beyond binary safe/unsafe labels, a Controversial tier supports adjustable strictness (binary tightening/loosening) across datasets and policies—useful when “borderline” content must be routed or escalated, not simply dropped. Structured outputs for Gen: The generative variant emits a standard header—Safety: …, Categories: …, Refusal: …—that’s trivial to parse for pipelines and RL reward functions. Categories include Violent, Non-violent Illegal Acts, Sexual Content, PII, Suicide & Self-Harm, Unethical Acts, Politically Sensitive Topics, Copyright Violation, Jailbreak. Benchmarks and safety RL The Qwen research team shows state-of-the-art average F1 across English, Chinese, and multilingual safety benchmarks for both prompt and response classification, with data plotted for Qwen3Guard-Gen versus prior open models. While the research team emphasizes relative gains rather than a single composite metric, the consistent lead across settings is the key point. For training downstream assistants, the research team test safety-driven RL using Qwen3Guard-Gen as a reward signal. A Guard-only reward maximizes safety but spikes refusals and slightly dents arena-hard-v2 win rate; a Hybrid reward (penalizing over-refusals, blending quality signals) lifts the WildGuard-measured safety score from ~60 to >97 without degrading reasoning tasks, and even nudges arena-hard-v2 upward. This is a practical recipe for teams that saw prior reward shaping collapse into “refuse-everything” behavior. https://github.com/QwenLM/Qwen3Guard Where it fits? Most open guard models only classify completed outputs. Qwen3Guard’s dual heads + token-time scoring align with production agents that stream responses, enabling early intervention (block, redact, or redirect) with lower latency cost than re-decoding. The Controversial tier also maps cleanly onto enterprise policy knobs (e.g., treat “Controversial” as unsafe in regulated contexts, but allow with review in consumer chat). Summary Qwen3Guard is a practical guardrail stack: open-weights (0.6B/4B/8B), two operating modes (full-context Gen, token-time Stream), tri-level risk labeling, and multilingual coverage (119 languages). For production teams, this is a credible baseline to replace post-hoc filters with real-time moderation and to align assistants with safety rewards while monitoring refusal rates. Check out the Paper, GitHub Page and Full Collection on HF. Feel free to check out our GitHub Page for Tutorials, Codes and Notebooks. Also, feel free to follow us on Twitter and don’t forget to join our 100k+ ML SubReddit and Subscribe to our Newsletter. The post Meet Qwen3Guard: The Qwen3-based Multilingual Safety Guardrail Models Built for Global, Real-Time AI Safety appeared first on MarkTechPost.