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Bill

Bill

SB 53

Artificial intelligence models: large developers.

2025-2026 Regular Session Introduced by Scott Wiener

California requires large AI model developers to implement safety measures, conduct risk testing, and report critical incidents to state regulators.

Chaptered by Secretary of State. Chapter 138, Statutes of 2025.
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Bill Summary · SB 53

Legislative bill overview

SB 53 establishes safety and transparency requirements for developers of large artificial intelligence models in California. The law requires AI developers to implement reasonable safety measures, conduct testing for critical risks, and report incidents involving their models to the state. It applies to companies developing models meeting specified computational thresholds.

Why is this important

As AI systems become increasingly powerful and integrated into critical infrastructure and consumer services, this represents one of the first state-level regulatory frameworks attempting to manage AI safety risks before deployment. The law creates precedent for AI governance that could influence federal policy and be adopted by other states, while imposing compliance costs on major tech companies operating in California.

Potential points of contention

  • Compliance burden and cost: Determining what constitutes "reasonable" safety measures is subjective; companies may face significant expenses implementing new testing and reporting protocols
  • Competitive impact: Requirements may advantage larger companies with greater resources to comply, potentially stifling smaller AI developers or startups
  • Regulatory ambiguity: Definitions of "critical risks" and incident reporting thresholds remain subject to interpretation, creating uncertainty for businesses about obligations
  • Jurisdictional reach: California's enforcement may have limited practical effect if companies can relocate or operate from other states/countries

Compiled from official sources — confirm details with the bill’s official record.

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