A new lawsuit claimed that tech giants Anthropic, OpenAI, SpaceXAI and Google made an “illegal” deal to slow the pace of their respective AI development, news agency Associated Press reported.

The lawsuit was filed Friday in the US District Court for the Northern District of California.

The coordination largely took place on September 12, the lawsuit argues, when Anthropic CEO Dario Amodei published an essay urging for industry-wide cooperation on decelerating advancements in favour of enhanced safety measures.

That same day, OpenAI CEO Sam Altman, SpaceXAI CEO Elon Musk and Google DeepMind's co-founder and chair Demis Hassabis each publicly responded to Amodei's proposals in agreement.

It's clear that an agreement among the chief rivals in AI that their progress "should be slower than competition would otherwise produce has an anti-competitive effect on consumers," the plaintiffs argued, as per AP.

Lawyers representing four named plaintiffs, who pay for subscriptions to ChatGPT, Claude, Grok or Gemini, are bringing the suit on behalf of a proposed nationwide class of other paid subscribers to those services.

The plaintiffs in the lawsuit contend they are not against the AI companies asking Congress, the White House or any other agency to develop AI regulation, nor are they against the companies asking for an antitrust exemption.

But achieving that kind of collaboration with the federal government could be an uphill battle.

"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.

Representatives for Anthropic, OpenAI, Google and SpaceXAI did not immediately respond to a request for comment Saturday.

His statement came after Jacob Coxon, a 27-year-old AI researcher who worked at both Anthropic and OpenAI, resigned and warned on Wednesday that AI could precipitate human extinction by 2030.

From SpaceX and Tesla boss Elon Musk to OpenAI CEO Sam Altman to Demis Hassabis, co-founder and chair of Google DeepMind and Chief Scientist of Alphabet, many backed Amodei's remarks calling for a slower pace of improvement in AI model capabilities.

In his initial essay proposing the slowdown, Amodei acknowledged potential antitrust challenges, writing that it would be helpful for the US government to mediate "or at least enable" these cross-lab discussions.

The government wouldn't need to participate, he wrote, but would need to "issue a narrow waiver for certain kinds of safety conversations".

In response, Sam Altman said on social media that OpenAI welcomes the idea of a "federal framework that sets consistent safety requirements," but said "we do not believe we need to wait for an anti-trust exemption or legislation to begin the work of providing this confidence".

He called into question why the industry leaders would be calling for regulation that, he says, "if strongly implemented, will drive them into oblivion and bankruptcy".

Trump said Saturday on social media that he is forming an AI task force and will appoint an "AI czar," but provided scant detail.

The Trump administration has been vocal about wanting American AI labs to outpace and excel past Chinese competition. While several Democratic leaders and candidates have called for sweeping action on AI regulation, Republicans have largely mirrored Trump's position.

Senator Josh Hawley said in a recent Senate hearing that "there is no world" in which he would agree to give "the most powerful companies in the history of the world" an exemption from antitrust laws to collaborate, arguing that they could collude together and stifle competition.