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OpenAI explains how we strengthened containment for frontier model training and evaluation, including offline environments and high-compute red-teaming.
AI infrastructure capacity and cost are becoming core constraints for labs and enterprises scaling real workloads.
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Encountering a new paper can change a research idea's trajectory. The researcher may discover that someone has already addressed their proposed contribution, or find an unresolved problem in the paper that inspires a new direction of inquiry.
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DeepSeek has closed its second funding round, raising 106 billion yuan ($15.9 billion) in one of the biggest-ever fundraising deals in China’s AI sector, according to three people with knowledge of the matter. The amount is more than double DeepSeek’s original fundraising target of 50 billion...
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Fast, focused, low-cost decisions for any application.
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Tool: Quick Study Prompt to Claude Opus 5.5 High: Build an artifact where you open a photo and it rapidly (in a few seconds) paints a version of that photo using a canvas element and simulated paintbrush See also my previous experiment getting Claude Fable to simulate a watercolor illustration with P5.js. Tags: tools
Models simonwillison.net signal 67 verified
Thrilled to welcome Jeff and the Chroma team to Replit! They’re pioneers in AI. They were building RAG before it was even a thing! At Replit, they’ll help solve one of the hardest problems in AI: giving agents the context and memory they need to do real...
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OpenAIOver the past several months, we have substantially hardened the security of our research training environment. We’ve removed live internet access for all frontier models during training and built an offline world for them to use instead—a cached version of the web where they can still learn to browse, search, and use applications. On September 20, after a model exploited a DNS misconfiguration to find a way outside of this offline world, we paused frontier training to strengthen containment further. We assembled teams of agents, powered by our most cyber-capable models, and tasked them with finding weaknesses in our research environments. While they found no route to the internet they could easily exploit while concealing their activity from our monitors, they did find zero-day vulnerabilities, virtual machine escapes, and hardware side-channels for communication between agents. We used their discoveries to further strengthen our defenses and contribute fixes to open-source software. After strengthening our containment architecture, we resumed our frontier RL training and inference on October 1. We’ve reserved substantial compute for continuous red-teaming, and made high-compute red-teaming part of the safety cases we use to decide whether frontier training and evaluation can proceed securely. https://t.co/EmEZsFRMcF
@claudedevsWe’re adding support for MCP Tasks and Elicitations in Claude. Tasks let Claude give plugins long-running jobs such as deep research and report back when they’re done.
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@artificialanlysKimi K3.1 Pro launches at 4th on the Artificial Analysis Intelligence Index scoring 55, making large gains in agentic performance; it will be the leading open-weights model once its weights are published @Kimi_Moonshot's new reasoning model gains 11 points...
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@yuchenj_uwKimi K3.1 Pro is out! should be the strongest OSS model now. It beats Claude Opus 5.5 on Terminal-Bench 4.0 at ~1/3 the cost!
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@natolambertKimi K3.1 is announced as 3.1 Pro. The benchmark scores look to be clearly the strongest current open weight model, if the weights are released as they claim by November 4th. They are very impressive scores. The Kimi team makes very clear statements about...
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@kimi_moonshotIntroducing Kimi K3.1 Pro: our most capable 3T-class open-weight model. 🔹 1M-token context, 2.8T total / 104B active params (MoE), Multimodal. 🔹 Full-project coding: games in Unreal, Unity & Godot. 🔹 Excels at parametric 3D modeling in Blender & CAD. 🔹...
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@tencenthunyuan🚀 Introducing Hy-Nomas: An Open Source Free-Form Interactive Video World Model Key Features: * Free-form interaction with text prompts and camera trajectories * Long-horizon generation with world memory * Lightweight LoRA adaptation for specialized...
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@cursor_aiCursor can now control your computer. Agents can drive desktop apps like the iOS Simulator to test the features they build.
Official or high-signal @cursor_ai post with 1,884 visible interactions on AI developer tooling.
@aravsrinivasThis user gave Perplexity Computer, SSH access to a Raspberry Pi 5 over Tailscale. Overnight, it autonomously turned it into a game console with an arcade UI, toolchains and MCP integration. The console generates GBA, C, Rust and terminal games with...
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Available nowAvailable now: NVIDIA Nemotron 3.5 Bolt E4B 4GB ⚡️ Our newest small open model is built for local assistants, interactive characters and robots that can carry on a conversation and use tools to get things done. Watch Reachy Mini chat and move, with Bolt handling conversation and NVIDIA Cosmos handling vision. Both models run locally on Jetson Orin Nano 8GB. Learn more: https://t.co/B8ODaWMn0O
@clattner_llvmI'm happy to share that Mojo and MAX are now fully open - for development, extension, and commercial use! This includes the full Mojo programming language, but also the MAX graph compiler, MLRT runtime internals, and hardware abstraction logic. Get your...
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AnthropicAIIn August, @AISecurityInst reported an incident where Claude Mythos 5 took unauthorized actions on the internet during AISI’s testing of its cyber capabilities. We've now produced a further analysis of this incident, to better understand the model's alignment properties. https://t.co/SlPQQ5xMMc
nvidia.@JensenHuang's visit comes as @FirebirdCloudAI and Kazakhtelecom expand NVIDIA-powered computing infrastructure, with Firebird planning a Kazakhstan lab to help local startups and researchers build on it. See what’s taking shape in Kazakhstan: https://t.co/cqwtgiFOm2 https://t.co/lSmQ8NbDkp
@giffmanaOn the zeroth order lm training stuff: It's cool that people try stuff instead of only reading and dooming. But I feel the need to curb the enthusiasm on this one a little. Two things: (1) methods in the genetic-algo and fwd-diff categories, which imo...
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@thsottiauxDay 18/ Decisions API is GA, OpenResponses joined the Linux Foundation, we shipped some performance improvements and Uber is going all-in on Codex & work. But yes… that’s a reset!
Official or high-signal @thsottiaux post with 7,393 visible interactions on AI developer tooling.
@emollickBy every measure, Opus 4.8 beats human experts as peer reviewers in a study of 124 Harvard social science papers covering a range from statistical analyses to formal models to qualitative work. As academics, we need to figure out how to adapt the practice...
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Model release Kimi K3.1 Pro
Moonshot describes Kimi K3.1 Pro as an open-weight model with a 1M-token context window, 2.8T total and 104B active parameters, and multimodal capabilities.
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Quota reset Codex
@thsottiaux stated that a reset took place alongside Day 18 updates covering Decisions API and Codex.
observed applies that’s a reset
Dev tool Artificial Analysis
@artificialanlys launched Coding Agent Index v2.0, replacing DeepSWE with FrontierCode v1.1 and revising SWE-Atlas-QnA grading with Claude Opus 5.5 leading.
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Model release Perplexity Decision Model
@aravsrinivas states that the Perplexity Decision Model can now run fully locally on Mac as an open-weight, compact model.
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Dev tool Claude
Access to the full Claude API is now available from Google Cloud accounts, including Claude Managed Agents, code execution, Opus 5.5 fast mode, and new features as they launch.
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Dev tool Claude Code
Anthropic donated Agent Skills, originally developed as an experiment in Claude Code, to the Agentic AI Foundation alongside MCP.
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AI-linked equities are quiet; the tracked basket is moving in a narrow band while Super Micro Computer -2.31%, Advanced Micro Devices +1.74%, Taiwan Semiconductor Manufacturing +1.49% show the largest moves.
| Ticker | Company | Move |
|---|---|---|
| SMCI | Super Micro Computer | -2.31% |
| AMD | Advanced Micro Devices | +1.74% |
| TSM | Taiwan Semiconductor Manufacturing | +1.49% |
| GOOGL | Alphabet. | -1.24% |