Simon Willison's Weblog
- OpenAI DevDay 2026 live blog
- Claude Sonnet 5.5
- Quoting @joedaroo
- Quoting Muse AI Agent
- 2026 in LLMs (so far)
- S3 Is the Future, S3 Is the Past
- Bluesky reply bot checker
- Kākāpō Party
- Quoting John Gruber
- Northern Gannet, Great Blue Heron, California Brown Pelican
- Note on 24th September 2026
- commit-rewriter 0.2
- datasette 1.0a41
- We just shipped support for the ugliest part of HTTP: Vary
- Gemini 3.8 TTS Playground
- Shadow roots, explained with live examples
- SF October 14th: A Birds of a Feather Session on Agentic Engineering
- Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
- llm 0.36
- Quoting @therealcornpop