An antitrust complaint against Anthropic, OpenAI, SpaceXAI and Google landed on Friday at the US District Court for the Northern District of California. The claim: the four agreed to slow AI development, and their paying customers foot the bill.
Who is suing
Four named people who subscribe to ChatGPT, Claude, Grok or Gemini. They are suing on behalf of a proposed nationwide class of all paid subscribers. Their lead attorney is Nick Rowley.
The argument is unusually plain. An agreement among the main rivals that their progress ‘should be slower than competition would otherwise produce’ has an anticompetitive effect on consumers. Pay for a subscription and you get less than you could have had.
September 12 as exhibit A
The complaint puts the agreement on September 12. That is the day Dario Amodei’s essay appeared, the one asking the industry to slow down and let outside evaluators in. Sam Altman, Elon Musk and Demis Hassabis publicly agreed afterwards. Those four companies are now the defendants.
The filing also leans on a July 2026 employee statement that mentions ‘intense competitive pressure not to unilaterally slow’ development. To the plaintiffs, that proves no company wanted to brake on its own — leaving an agreement as the only way it could happen. Rowley puts it bluntly: AI will quickly spin out of human control and could kill us all if safety and protocol are left to ‘private self-serving agreements between the world’s most powerful “for profit” technology companies’.
None of the four has commented so far.
Antitrust law, of all things
Until now antitrust was what the labs were asking for, not what was aimed at them. Amodei wanted a waiver so the companies could set joint standards at all; OpenAI put the same question to Congress. This complaint flips it around and supplies the answer they were all afraid of: without a waiver, slowing down together is attackable.
Whether it wins is another matter. Coordinated conduct has to be proven, and four CEOs agreeing with the same essay is not yet a cartel. But the suit shows how narrow the corridor is. Slow down alone and you lose share. Slow down together and you hear from a lawyer.