California Transparency in Frontier AI Act (SB 53)
California's Transparency in Frontier Artificial Intelligence Act (SB 53), signed in September 2025, requires large developers of frontier AI models to publish safety frameworks and report critical safety incidents.
What is California Transparency in Frontier AI Act (SB 53)?
It applies to frontier models trained with over 10^26 operations, with extra duties for developers with revenue above $500 million, and includes whistleblower protections.
How it works
Developers publish frameworks and transparency reports and report incidents to the California Office of Emergency Services.
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