California Transparency in Frontier Artificial Intelligence Act
Requires developers of the largest frontier models to publish safety frameworks, report critical safety incidents, and protect whistleblowers — the leading US model for frontier-AI transparency.
Overview
Requires developers of the largest frontier models to publish safety frameworks, report critical safety incidents, and protect whistleblowers — the leading US model for frontier-AI transparency.
Key dates
- Sep 29, 2025Signed into law
- Jan 1, 2026Took effect
Risk areas addressed
Who it applies to
Developers of large frontier AI models (trained above defined compute thresholds) doing business in California.
Penalties & enforcement
Civil penalties for non-compliance with transparency and incident-reporting duties.
Enforced by: California Attorney General / Office of Emergency Services
Whatever your exposure to California SB 53, the practical work is the same: inventory the AI systems in scope, map them to concrete obligations, and keep the evidence to show it. A structured AI governance programme — risk assessments, documentation and continuous monitoring — turns a moving regulatory target into a repeatable process.