Four AI companies, Anthropic, OpenAI, Google, and xAI, face an antitrust lawsuit filed on September 18 in the U.S. District Court for the Northern District of California. Four paid subscribers of these services allege that the companies coordinated to slow down AI development, thereby limiting competition and reducing the value of services like ChatGPT, Claude, Grok, and Gemini.
The plaintiffs point to events on September 12, when Anthropic CEO Dario Amodei published an article advocating for industry-wide coordination to control AI development speeds for safety reasons. On the same day, OpenAI CEO Sam Altman, xAI founder Elon Musk, and Google DeepMind lead Demis Hassabis publicly expressed support for this approach, which the lawsuit characterizes as evidence of an illegal agreement.
The complaint also references a statement signed in July by senior employees from major AI labs, who acknowledged competitive pressures that prevent unilateral slowdowns and called for government support to decelerate automation. Plaintiffs argue this indicates that the September coordination was not an isolated event but part of a broader strategy to restrict output.
The lawsuit alleges that these actions violate Section 1 of the Sherman Antitrust Act by suppressing product improvements while maintaining subscription prices. The plaintiffs seek class-action status to represent all paid users across the United States and request that the court stop the companies from continuing these coordinated activities.
The defendants have not yet responded to requests for comment. The case highlights a legal conflict between industry-led AI safety initiatives and antitrust regulations, as the court must now determine whether safety-focused cooperation among competitors constitutes anti-competitive behavior.
