Skip to content
IFAI

Petri

Product2 stories

  1. Open sourceReach 46

    Anthropic hands off its AI alignment tool

    Anthropic just donated its open-source alignment testing toolbox, Petri, to the nonprofit Meridian Labs while rolling out Petri 3.0. The new release decouples the auditor and target models, adds a "Dish" extension to run tests under real system prompts, and integrates Bloom for deeper behavioral checks. Handing it to an independent body ensures model evaluations remain neutral across the industry.

  2. Open sourceReach 47

    Anthropic open-sources Petri to put AI safety auditing on autopilot

    Anthropic just released Petri, an open-source auditing tool that deploys automated agents to grill AI models in multi-turn conversations and flag dangerous behaviors like deception, self-preservation, or unauthorized whistleblowing. In pilot tests across 14 frontier models, Claude Sonnet 4.5 edged out GPT-5 as the lowest-risk system. Why it matters: as models get smarter, manual red-teaming can't scale—now researchers can stress-test frontier systems in minutes.