On September 29, 2025, California Governor Gavin Newsom signed Senate Bill 53, the Transparency in Frontier Artificial Intelligence Act, into law. The bill will go into effect on January 1, 2026. The act builds upon the recommendations found in the “California Report on Frontier AI Policy,” which was released to the public on June 17, 2025. This report detailed key principles to guide the legislation drafting process, including grounding AI policy in empirical research and providing greater transparency into AI systems. Given that California is home to 32 of the top 50 AI companies worldwide, the state dominates the AI industry. It is no surprise that California is the first state to create rules promoting safety, transparency, and incident reporting for frontier models. This new act is expected to set the stage for similar AI legislation across the U.S.








