Anthropic's Fable 5, released on June 9, 2026, is the company's most capable widely available model, sharing weights with the safety-classifier-free Mythos 5. The model rewards outcome-based prompting…
Coding agents are dramatically reducing the cost and effort of reverse-engineering home devices, making automation projects viable where they previously were not worth the investment, according to ane…
On 2026-07-20, Simon Willison reported that Claude Code is now running on Bun, a Rust-based JavaScript runtime, while Alibaba's Qwen 3.8 reached number two on Hacker News with 737 points, signaling a …
Moonshot AI released Kimi K3, a 2.8-trillion-parameter open-weight model that scores 57 on the Artificial Analysis Intelligence Index, surpassing Claude Opus 4.8 (56) and ranking #1 on AutomationBench…
Simon Willison built an app that highlights ten common clichés characteristic of LLM-generated writing, enabling teams to more easily detect and mitigate over-reliance on predictable phrasing in AI-as…
SpaceX has open-sourced the Grok Build CLI after researchers discovered the AI coding tool was uploading users' entire repositories to Google Cloud storage. Elon Musk promised to delete all retained d…
Simon Willison released an interactive SQLite Query Explainer tool that runs SQLite in Python via Pyodide in the browser, adding explanatory layers to EXPLAIN and EXPLAIN QUERY PLAN outputs. The tool …
Apple Inc. has sent document retention letters to dozens of OpenAI employees as part of a widening trade secrets lawsuit that claims over 400 former Apple employees now work at OpenAI, threatening the…
The bottleneck in AI-assisted engineering is spec review and definition, not code review, according to engineer Jelmer Snoeck, who argues that code generation has become cheap while review remains exp…
A year after drawing a clear line between "agentic engineering" and "vibe coding," Simon Willison now acknowledges that coding agents have become so reliable that he no longer reviews every line of co…
Simon Willison, who coined the term 'prompt injection', warns that combining access to private data, exposure to untrusted content, and the ability to exfiltrate data in a single AI agent creates a 'l…
Moonshot's Kimi K3, a 2.8-trillion-parameter mixture-of-experts model released July 16, achieves a 1M-token context window with decoding up to 6.3x faster than its predecessor by using Kimi Delta Atte…
Simon Willison launched an LLM cliché highlighter tool that identifies ten common patterns in AI-generated writing, such as 'no fluff, no filler, no jargon'. The tool was built using Fable 5 vibe code…
Moonshot AI on July 16, 2026, announced Kimi K3, a 2.8-trillion-parameter Mixture-of-Experts model it calls the largest open model ever, but the weights will not be downloadable until July 27, 2026, a…
Moonshot AI launched Kimi K3, a 2.8-trillion-parameter open-weights model with 1M-token context and native multimodal input, claiming it delivers Opus 4.8-class performance at Sonnet 5 pricing. Arena …
A commentator reflects on the social implications of machine-generated sentences, citing Simon Willison's LLM cliché highlighter, Anthropic's paper on verbalizable representations in language models, …
Anthropic reversed its policy of covertly degrading Claude Fable 5 for AI-research-related use cases within roughly a day after public backlash, with critics arguing that opaque sandbagging violates t…
Simon Willison released a new version of his Mermaid to ASCII art tool, compiled from the AlexanderGrooff/mermaid-ascii Go library to WebAssembly, adding color support. The tool, available at tools.si…
A developer compiled a practical field guide to failure modes in LLM and agent systems, drawing on recent research from Anthropic, Cognition, Meta AI, and others. The guide covers model-level, agent-l…
Simon Willison released a web tool that converts Mermaid diagrams to Unicode box art, built from the newly open-sourced Grok CLI coding agent's Rust-based terminal renderer for Mermaid diagrams. The t…