Lawsuit alleges Anthropic, OpenAI, SpaceXAI and Google made illegal AI slowdown agreement

A class-action antitrust lawsuit filed on September 18, 2026, in California accuses Anthropic, OpenAI, SpaceXAI, and Google of illegally agreeing to slow AI development. The suit, representing paid subscribers of ChatGPT, Claude, Grok, and Gemini, claims that public agreements on September 12, 2026, following an essay by Anthropic CEO Dario Amodei, constitute anticompetitive collusion that reduces consumer value. While AI executives defend safety coordination, political figures like Senator Josh Hawley and President Donald Trump oppose antitrust exemptions and restrictive regulations.

Antitrust lawsuit against AI companies

• ▪A civil lawsuit filed on Friday, September 18, 2026, in the U.S. District Court for the Northern District of California alleges that Anthropic, OpenAI, SpaceXAI, and Google violated antitrust laws by making an illegal agreement to slow the pace of artificial intelligence development
• ▪The class-action antitrust lawsuit filed on September 18, 2026, in the U.S. District Court for the Northern District of California against Anthropic, OpenAI, SpaceXAI, and Google was brought by lawyers representing four named plaintiffs who pay for subscriptions to ChatGPT, Claude, Grok, or Gemini, on behalf of a proposed nationwide class of paid subscribers

Alleged AI development slowdown agreement

• ▪The class-action antitrust lawsuit filed on September 18, 2026, in the U.S. District Court for the Northern District of California against Anthropic, OpenAI, SpaceXAI, and Google alleges that coordination among the AI companies occurred on September 12, 2026, when Anthropic CEO Dario Amodei published an essay urging industrywide cooperation to decelerate advancements in favor of enhanced safety measures
• ▪On September 12, 2026, OpenAI CEO Sam Altman, SpaceXAI CEO Elon Musk, and Google DeepMind co-founder and chair Demis Hassabis publicly agreed on social media with Anthropic CEO Dario Amodei's September 12, 2026 essay calling for industrywide cooperation to pace AI development

AI safety versus competition debate

• ▪In his September 12, 2026 essay, Anthropic CEO Dario Amodei acknowledged potential antitrust challenges and suggested that the U.S. government issue a narrow waiver for safety conversations to enable cross-lab discussions
• ▪OpenAI CEO Sam Altman stated on social media that OpenAI welcomes a federal framework for safety requirements but does not believe the company needs to wait for an antitrust exemption or legislation to begin safety coordination
• ▪Senator Josh Hawley stated in a Senate hearing that he would not support giving major technology companies an antitrust exemption to collaborate, arguing that such exemptions would allow them to collude and stifle competition

Trump opposition to AI regulation

• ▪President Donald Trump announced on social media on Saturday, September 19, 2026, that he is forming an AI task force and will appoint an AI czar, though he provided few details
• ▪President Donald Trump rejected calls for AI regulation on social media, calling efforts to limit the technology a conspiracy that could drive industry leaders into oblivion and bankruptcy

Debatable claims

• ▪The U.S. should grant AI companies an antitrust waiver for safety coordination
• ▪AI companies should self-regulate safety instead of lobbying for government rules
• ▪The US government should regulate artificial intelligence to slow its development