Anthropic Publishes New Claude AI Constitution

Jan. 21, 2026, 4:07 PM UTC

Anthropic released a new constitution detailing the values and training principles that guide its Claude AI models, aiming to improve safety, ethics and transparency.

  • Sets core priorities: safety, ethics, guideline compliance, helpfulness
  • Used directly in training, including synthetic data and response ranking
  • Shifts from rigid rules to principle-based reasoning
  • Includes hard constraints such as bans on bioweapons assistance
  • Released publicly under a Creative Commons CC0 1.0 license

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