Anthropic, OpenAI, SpaceXAI and Google Face Antitrust Suit Over AI Slowdown Calls

The companies publicly backed coordination on the pace of frontier AI development. A new lawsuit argues that support became an unlawful agreement. Filed in the Northern District of California, the case names Anthropic, OpenAI, SpaceXAI and Google and alleges antitrust violations.

The plaintiffs allege that public statements supporting an industry-wide slowdown in frontier AI development restricted competition in violation of the Sherman Act. Their argument is not that the companies merely shared safety concerns. The complaint alleges that the statements amounted to a business agreement over the pace of development.

The public statements at issue

According to the lawsuit, Anthropic chief executive Dario Amodei called for industry-wide coordination to pace frontier AI development. It identifies SpaceXAI head Elon Musk, OpenAI chief executive Sam Altman and Google DeepMind co-founder Demis Hassabis as making or supporting the cited public statements.

That makes the case a challenge to a particular safety approach: rival companies aligning on their own development pace. Whether the cited statements establish the agreement alleged by the plaintiffs has not been decided by a court.

The rule of law should be established transparently and lawfully by our government, with accountability to the public.

Nick Rowley, lawyer for the plaintiffs

A class-action bid tied to public oversight

The suit was brought by Cheyenne Hunt, Charles Buist, Nick Spetsas and Christine Bullock. The plaintiffs said they intend to seek class-action status for people allegedly affected by corporate decisions to slow AI development.

Rowley said the case is meant to prevent private arrangements from bypassing regulatory oversight. That position supplies the lawsuit’s policy argument: if frontier-AI safeguards are needed, the plaintiffs say they should be set through government processes accountable to the public, rather than through an arrangement among major companies.

A legal test of voluntary restraint

The filing does not settle how quickly AI developers should build new systems or which safety rules they should follow. Its narrower claim is that competitors cannot jointly set a development pace if that coordination restricts competition. The court must now assess the plaintiffs’ allegation, not simply the desirability of slower AI development.