California's AI Transparency Act Is Now Live: What SB 942 Means for Your Generative AI Startup
California's AI Transparency Act (SB 942) became operative on August 2, 2026 after AB 853 pushed back its January start. Generative AI providers with more than one million monthly California visitors or users must offer a free detection tool with upload, URL and API intake, an optional visible label, and a mandatory latent watermark, revoke licenses within 96 hours of discovering tampering, and face $5,000 per violation per day. This guide covers who is a covered provider, the 2027 platform and 2028 capture-device phase-ins, a compliance checklist, and how to budget and book the program.
