Anthropic donates Petri to Meridian Labs; major update released

Anthropic@AnthropicAIMay 7, 2026

We’re donating Petri, our open-source alignment tool, to @meridianlabs_ai, so its development can continue independently. Working with Meridian Labs, we’ve also released a major update that improves the adaptability, realism, and depth of Petri’s tests. https://t.co/CyicsIScJi

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