SB 53 (California Transparency in Frontier AI Act)

Anthropic Publishes Frontier Compliance Framework for California's SB 53 Transparency in Frontier AI Act

Anthropic has released its Frontier Compliance Framework (FCF) in advance of California's SB 53 taking effect on January 1, 2026, which establishes the first mandatory frontier AI safety and transparency requirements in the US. The FCF covers risk assessment and mitigation for cyber, CBRN, and AI autonomy/control risks, tiered capability evaluation, model weight protection, and incident response. Anthropic frames the FCF as an evolution of its existing Responsible Scaling Policy, which will continue as a voluntary safety policy beyond regulatory minimums. The company also calls for a federal AI transparency framework with analogous requirements applied only to the largest frontier developers.