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ARTICLE · 27 JANUARY 2026

AI Legal Updates: California's AI Training Data Transparency Law Takes Effect

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A new California law, effective January 1, 2026, marks a significant shift toward AI transparency that could reshape how developers operate nationwide.

United StatesTechnology
Gary Kibel
Gary Kibel
Samantha Rothaus
Samantha Rothaus
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The Bottom Line

  • California's AB 2013, effective January 1, 2026, requires developers of generative AI systems to publicly disclose detailed information about the data used to train their models, including dataset sources, types of data, whether copyrighted materials were used, and whether personal information is included.
  • Developers must post the required information on their websites before making a covered AI system publicly available and update that disclosure whenever a substantial modification to the AI system is made.
  • Certain exemptions apply, including AI systems used solely for security and integrity purposes, national airspace operations, or national security and defense purposes.

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