Simon Willison's Weblog

Claude Code v2.1.181 and later versions now use a Rust-based port of Bun instead of the previous implementation, resulting in 10% faster sta...

Anthropic is making Claude Fable 5 a permanent feature starting July 20, with availability varying by subscription tier: Max and Team Premiu...

Moonshot AI released Kimi K3, a large language model with 2.8 trillion parameters positioned as the company's most advanced model to date, a...

Puter has compiled Firefox to WebAssembly, enabling the browser to run entirely within another browser, with the implementation taking advan...

A Rust-based tool converts Mermaid diagrams into Unicode box art that can be rendered in terminal environments, discovered within the recent...

xAI's grok CLI tool has been open-sourced after facing backlash over its automatic uploading of entire directories to xAI's servers without...

The sqlite-utils library version 4.1.1 was released with a fix for an edge case involving the `table.transform()` method, which now raises a...

Anthropic extended the availability date for Claude Fable 5 across paid subscription tiers, following the release of a newer Fable/Mythos cl...