Simon Willison’s Weblog

17th March 2026

Release llm 0.29 — Access large language models from the command-line

Adds support for OpenAI's new models gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano.

Posted 17th March 2026 at 7:24 pm

Recent articles

Now we have a timeline of the OpenAI accidental attack against Hugging Face - 7th August 2026
One-shotting a Raccoon Heist game using Claude Fable 5 - 5th August 2026
New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging - 4th August 2026

This is a beat by Simon Willison, posted on 17th March 2026.

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