California's AI Transparency Act

The California AI Transparency Act became operative on August 2, 2026.

What Matters Today

• The first phase of the California AI Transparency Act (CAITA, SB 942/AB 853) is now in effect. (calmatters.digitaldemocracy.org)
• It applies to publicly accessible generative AI providers with more than one million monthly users or visitors.
• Covered providers must offer a free tool for checking whether their systems created or altered an image, video, or audio file.
• Covered providers must include machine-readable information in qualifying AI-generated content, subject to technical-feasibility limits.
• Later phases will apply to large online platforms beginning January 1, 2027, and to certain manufacturers of recording devices beginning January 1, 2028.

Who Is Affected

The August 2 requirements apply to companies that create, code, or otherwise produce publicly accessible generative AI systems with more than one million monthly users or visitors.

The covered content categories are image, video, and audio. The law does not create a comparable general disclosure requirement for AI-generated text.

The current phase applies to providers of large generative AI image, video, and audio tools, with the 2027 and 2028 requirements reaching platforms and device manufacturers.

What to Do Now

Covered providers must make a free verification tool available to the public. The tool is intended to allow a person to assess whether the provider’s system created or altered a particular file.

The law also requires covered providers to include hidden, machine-readable disclosure information in qualifying AI-generated image, video, and audio content. Providers must offer users an option to include a visible disclosure as well.

The statute imposes limits on the data collected through verification tools. It also provides for civil penalties of up to $5,000 per violation, with continuing violations treated separately by day. (sjud.senate.ca.gov)

The California Attorney General has not issued detailed compliance guidance. As a result, the form of implementation and enforcement expectations remain unsettled.

What Happens Next

Beginning January 1, 2027, the law adds requirements for large online platforms. Those requirements concern identifying and displaying qualifying machine-readable information in distributed content and preserving it where technically feasible.

Beginning January 1, 2028, the law adds requirements for manufacturers of newly produced recording devices sold in California, including certain cameras, phones, and audio-recording devices.

AB 853 created this phased implementation schedule and delayed the provider requirements from January 1, 2026, to August 2, 2026. The 2027 platform obligations and 2028 device-manufacturer obligations are the next major implementation dates. (jdsupra.com)

Pending Changes

SB 1000 would amend the California AI Transparency Act. The bill proposes revisions to the law’s terminology, scope, disclosure-verification requirements, and licensing provisions.

GitHub, Mozilla, Hugging Face, and Black Forest Labs have asked California lawmakers to revise provisions they contend conflict with common open-source licensing terms. Their stated concern is focused on proposed license-revocation requirements for downloadable models and software. (github.blog)

As of August 4, 2026, SB 1000 remains pending and has not changed the obligations currently in effect. (leginfo.legislature.ca.gov)

Orthogonal Take

The California AI Transparency Act is part of a broader shift from voluntary AI labeling toward formal disclosure requirements.

The law does not require platforms or users to determine whether content is accurate. It requires certain companies to preserve and make available information about whether AI systems created or changed particular images, video, and audio.

Its practical effect will depend on how consistently that information is added, retained, recognized across services, and presented to users. The phased requirements for AI providers, online platforms, and device manufacturers place California at different points in the digital-content chain rather than focusing only on the company that generates an AI file.

Note: This article was drafted with the assistance of AI. The information provided in this article is for general informational purposes only and does not constitute legal advice. Reading this content does not create an attorney-client relationship. You should consult a licensed attorney for help with any legal issue.