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llm-anthropic 0.30

Collected Oct 6, 2026

Simon Willison released llm-anthropic 0.30. The release adds support for Claude Sonnet 5.5, according to the release notes.

The update introduces a command, llm anthropic refresh, that refreshes the list of Anthropic models directly from Anthropic's API. Willison wrote that this means he does not need to push a new release just to add support for a newly released model.

The release also adds an llm anthropic count command. According to the notes, it can use Anthropic's free token counting API to return a count of tokens that will be used by any prompt before that prompt is sent.

The release is tagged llm and anthropic.

Read at Simon Willison

Based on reporting from the original publisher. Visit the source for full context and later updates.

Publisher excerpt

Release: llm-anthropic 0.30 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. Tags: llm , anthropic