llm-anthropic 0.30

Simon Willison released llm-anthropic 0.30 on 28th September 2026, adding support for Claude Sonnet 5.5 plus two new commands. The `llm anthropic refresh` command pulls the current Anthropic model list directly from the API so new models no longer require a plugin release, and `llm anthropic count` uses Anthropic's free token counting API to report the tokens a prompt will consume before it is sent.

28th September 2026 In addition to Claude Sonnet 5.5, this release adds the ability to run llm anthropic refresh to refresh the list of Anthropic models directly from their API - which means I don't need to push a new release just to add support for a newly released model. I also added an llm anthropic count command which can use their free token counting API to return a count of tokens that will be used by any prompt, before you send that prompt. Recent articles - We're going to need default hard budget caps on pretty much everything https://simonwillison.net/2026/Oct/3/default-hard-budget-caps/ - 3rd October 2026 - OpenAI DevDay 2026 live blog https://simonwillison.net/2026/Sep/29/openai-devday-2026-live-blog/ - 29th September 2026 - 2026 in LLMs so far https://simonwillison.net/2026/Sep/27/2026-in-llms-so-far/ - 27th September 2026