A federal lawsuit filed in the Northern District of California alleges that Anthropic, OpenAI, SpaceX AI, and Google engaged in illegal collusion by coordinating efforts to slow AI development. The complaint cites Anthropic CEO Dario Amodei's recent call for "industry-wide coordination" to set the pace of frontier AI, which was publicly endorsed by Elon Musk, Sam Altman, and Demis Hassabis, as evidence of an unlawful business agreement among competitors under U.S. antitrust law. Plaintiffs' attorney Nick Rowley stated the case seeks to prevent private agreements among powerful tech companies from allowing AI to escape human control. The lawsuit argues that safety regulations regarding existential risks should be established transparently by the U.S. government rather than through self-interested pacts between for-profit corporations.