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Simon Willison updates llm-anthropic tool to support Claude Sonnet 5.5

By PulseAugur Editorial · [2 sources] ·

Simon Willison has released version 0.30 of his llm-anthropic tool, which now supports Claude Sonnet 5.5 and allows users to refresh the list of Anthropic models directly from their API. This update also introduces a token counting command, enabling users to estimate prompt token usage before submission. The release aims to streamline the integration of new Anthropic models and provide better cost management for users. AI

IMPACT Streamlines integration with Anthropic models and improves cost management for developers using LLMs.

RANK_REASON The update is for a third-party tool integrating with AI models, not a direct release from a frontier lab.

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AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

Simon Willison updates llm-anthropic tool to support Claude Sonnet 5.5

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The update is for a third-party tool integrating with AI models, not a direct release from a frontier lab.
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COVERAGE [2]

  1. Simon Willison TIER_1 English(EN) ·

    llm-anthropic 0.30

    <p><strong>Release:</strong> <a href="https://github.com/simonw/llm-anthropic/releases/tag/0.30">llm-anthropic 0.30</a></p> <p>In addition to Claude Sonnet 5.5, this release adds the ability to run <code>llm anthropic refresh</code> to refresh the list of Anthropic models directl…

  2. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    llm-anthropic 0.30 https://simonwillison.net/2026/Sep/28/llm-anthropic/ # AI # LLM # OpenSource

    llm-anthropic 0.30 https://simonwillison.net/2026/Sep/28/llm-anthropic/ # AI # LLM # OpenSource

    LINKS simonwillison.net/…/llm-anthropic

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