September 20, 2026, (Inside AI) — A proposed class-action lawsuit filed Friday in the US District Court for the Northern District of California accuses OpenAI, Anthropic, Google, and SpaceXAI of violating antitrust law by coordinating to slow down artificial intelligence development under the banner of safety.
The complaint, brought by four paid subscribers of ChatGPT, Claude, Grok, and Gemini on behalf of a nationwide class, argues that the companies' public alignment on deceleration amounts to collective restraint of trade. The plaintiffs say this coordination could reduce the value consumers receive from their AI subscriptions.
The immediate trigger was a September 12 essay by Anthropic CEO Dario Amodei, who urged leading AI firms to cooperate on slowing capability advances and devote more time to safety. He suggested the US government could grant a narrow antitrust waiver for such discussions.
On the same day, OpenAI CEO Sam Altman, SpaceXAI CEO Elon Musk, and Google DeepMind co-founder and chair Demis Hassabis publicly responded in agreement. The plaintiffs also cite a July statement signed by senior employees at several AI labs, which acknowledged competitive pressure against unilateral slowing and called for government support for a global effort.
The lawsuit does not argue that a single company cannot choose to slow development. Instead, it targets what the plaintiffs describe as a collective agreement among competitors to restrain their own progress.
"AI will quickly spin out of human control and could kill us all if we allow AI safety and protocol ... to be controlled by private self-serving agreements between the world's most powerful 'for profit' technology companies," said Nick Rowley, the lead attorney for the plaintiffs, according to the Associated Press.
The complaint draws a distinction between safety regulation and collective restraint. It says antitrust laws forbid firms from taking the shortcut of agreeing to "substitute collective restraint for individual accountability." A competitive market, the plaintiffs argue, already allows for responsibility and genuine progress.
Antitrust law exists to promote fair competition and prevent monopolies. One core concern is that competitors might coordinate instead of competing independently. The plaintiffs contend that if the chief rivals agree AI progress should be slower than it would be under competition, consumers could receive less valuable products or fewer improvements for the same subscription prices.
The four companies are the world market leaders, excluding Chinese firms, in a fast-changing technology. That dominance has fueled criticism from smaller players. French startup Mistral, one of Europe's leading AI firms, said in a statement, "Some incumbents are using this moment to consolidate their market position, pushing for regulation designed to favour them over competitors."
Raphael Auphan, chief operating officer of Swiss privacy software company Proton, told Reuters, "I think this is totally self-serving. They just want to preserve a dimension of dependency on their service."
While the four AI companies have asked the government to step in, US President Donald Trump has taken a different position. On September 19, he announced plans to appoint an "AI czar" and create an "AI force," though he provided no details. In a social media post, Trump said the US would not "hinder or stifle" the growth of the AI industry. Instead, he said the administration would "cherish it, help it, and watch over it," relying on the existing criminal and civil justice system to deal with wrongdoing.
Trump has repeatedly argued against additional regulation that could hinder the American AI industry, stressing the need to maintain a lead over China. His administration has emphasized the importance of American AI companies competing with Chinese rivals.
The case raises unresolved questions about how antitrust law applies when competitors cite safety as a reason to coordinate. It also tests whether public statements by CEOs can constitute an agreement. Legal experts note that antitrust claims typically require evidence of a concrete agreement, not just parallel public positions. The plaintiffs will need to show that the companies' statements translated into coordinated action that harmed consumers.
For now, the lawsuit adds a new front to the debate over AI governance. It pits concerns about existential risk against traditional competition principles, with the world's most valuable AI firms caught in the middle.
