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llm-anthropic 0.29

Blog · Watch/Read · (gathered 2026-09-23)

  • Simon Willison announced the release of llm-anthropic version 0.29.
  • The primary new feature in this release is the addition of support for Anthropic’s Claude Opus 5.5 model.
  • Users can now interact with Claude Opus 5.5 directly through the llm command-line tool using the syntax : llm -m claude-opus-5.5 "prompt goes here".