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Model ReleaseSep 2, 2026

llm-anthropic 0.28

llm-anthropic 0.28 has been released, featuring Claude Fable 5.1, default display of reasoning traces for supported models, and a new ClaudeRefusal exception.

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Claude Fable 5 model Claude tool Anthropic company

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Simon Willison’s WeblogPrimary source

llm-anthropic 0.28

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