California Gov. Gavin Newsom (D) signed a bill Monday requiring artificial intelligence (AI) companies to disclose safety information about large-scale frontier models in a key win for the push to regulate AI in Silicon Valley’s home state.

S.B. 53, the Transparency in Frontier AI Act, will require developers of these leading-edge AI models to publish frameworks detailing how they assess and mitigate catastrophic risks.

“California has proven that we can establish regulations to protect our communities while also ensuring that the growing AI industry continues to thrive,” Newsom said in a statement Monday. “This legislation strikes that balance.”

“AI is the new frontier in innovation, and California is not only here for it — but stands strong as a national leader by enacting the first-i

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