Simon Willison 1/22/2026

Claude's new constitution

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The article discusses Anthropic's official release of Claude AI's internal 'constitution', a 35,000+ token document that outlines the AI's core values and training procedures. It was discovered by a user and confirmed by Anthropic. The piece highlights its length, its public domain license, and notes the inclusion of external reviewers, including members of the Catholic clergy with relevant backgrounds.

Claude's new constitution

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