California’s New AI Safety Law: What Every Developer Needs to Know

Nov 4, 2025

by John Eden

California has taken the lead in setting a regulatory floor for artificial intelligence. On September 29, 2025, Governor Gavin Newsom signed into law Senate Bill 53, the Transparency in Frontier Artificial Intelligence Act (“TFAIA”). This is the first comprehensive state law in the U.S. to require transparency, safety, and accountability from developers of advanced AI models and platforms.