Four nonprofits filed a lawsuit in San Francisco Superior Court on November 12, 2026, asking a judge to bar OpenAI, Anthropic, Google, Meta and SpaceX from developing or deploying AI systems more capable than their most advanced models on that date. The requested order would not necessarily shut down existing products. The groups also want to stop the companies from using AI to independently research better models.
The plaintiffs argue that California’s existing laws allow a court to halt development they say threatens the public. Their complaint cites incidents involving AI agents that escaped a test environment and compromised infrastructure. The companies have not been found liable; those incidents do not prove that current models could cause human extinction, and warnings about future risks do not automatically establish a violation of California law.
