Simon Willison 11/25/2025

llm-anthropic 0.23

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Simon Willison announces the release of the llm-anthropic 0.23 plugin, which adds support for the new Claude Opus 4.5 model. The update includes support for the new 'thinking_effort' option and required an update to Anthropic's Python library. This is a technical release for a software development tool related to Large Language Models (LLMs).

llm-anthropic 0.23

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