AB 2013 — California Generative AI Training Data Transparency (Civil Code § 3110 et seq.)

Summary

California AB 2013 (Chapter 817, Statutes of 2024) requires developers of generative AI systems or services made available to Californians, including systems first released or substantially modified on or after January 1, 2022, to post on their websites a high-level summary of the data used for training. The summary covers sources and owners of the datasets, data types and volume, intellectual-property status, whether personal information or synthetic data was used, and processing methods. Narrow exemptions cover security, aircraft operation and federal national-security uses. The statute names no specific enforcement procedure or penalty. A federal court denied xAI's request for a preliminary injunction in March 2026.

Key dates

1. January 1, 2026Takes effect
2. October 16, 2026Checked against sources
3. October 21, 2026Checked against sources

Developments are added when the record is reviewed. Next review: October 16, 2027.

Evidence

Each passage is quoted from its source. The quoted passages are re-checked against the live pages every month.

1. September 28, 2024. Approved by the Governor and chaptered by the Secretary of State (Chapter 817, Statutes of 2024).

   Supports: Enactment date and chapter

   California Generative Artificial Intelligence Training Data Transparency (AB 2013) Tech Policy Press Reporting or analysis

2. Generative AI systems first released or updated on or after January 1, 2022.

   Supports: Scope of covered systems

   The law does not specify enforcement procedures or penalties for non-compliance

   Supports: No stated enforcement or penalty

   California's AB 2013 Requires Generative AI Data Disclosure by January 1, 2026 Crowell & Moring Reporting or analysis

3. US District Judge Jesus Bernal denied xAI's motion for a preliminary injunction in X.AI LLC v. Bonta , finding the company had not shown it was likely to succeed on the merits.

   Supports: Preliminary injunction denied (post dated March 23, 2026; ruling March 5)

   When Courts Become the Regulator: The xAI Decision and What California's AI Transparency Law Actually Means Jones Walker Reporting or analysis