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Simon Willisonpublished ()ingested 2

llm-anthropic 0.28

infoAI tools & infraimportance 15
AI summary · glm-5.3-flash

llm-anthropic 0.28 released with Claude Fable 5.1 support, default reasoning traces and a new ClaudeRefusal exception.

Developer Simon Willison released version 0.28 of the llm-anthropic Python plugin, adding support for Claude Fable 5.1. Reasoning traces are now displayed by default for models that support them, and a new llm_anthropic.ClaudeRefusal exception is raised when Claude returns a refusal.

  • Adds Claude Fable 5.1 model support
  • Reasoning traces now shown by default; new ClaudeRefusal exception
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VendorsAnthropic
Productsllm-anthropicClaude Fable 5.1
AI modelsClaude Fable 5.1
Tagsllmanthropicclaudedeveloper-toolspythonrelease
Full article

Release: llm-anthropic 0.28 Claude Fable 5.1 , reasoning traces are now displayed by default for models that support them, plus a new llm_anthropic.ClaudeRefusal exception for when Claude throws a refusal. Tags: llm , anthropic , claude , claude-mythos-fable

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