Four Subscribers Sue Anthropic, OpenAI, Google and SpaceXAI Over Alleged AI Slowdown Cartel

Four paying subscribers have sued Anthropic, OpenAI, SpaceXAI, and Google, claiming the labs agreed to slow consumer AI upgrades so customers would get less for the same subscription price.

The proposed class-action complaint landed Friday, 18 September 2026, in San Francisco federal court as case 3:26-cv-10693, captioned Buist et al. v. Anthropic PBC et al. It alleges a Sherman Act Section 1 agreement and asks for treble damages plus an injunction. The claims are unproven. Nobody has been indicted, and none of the labs has admitted a cartel.

The named plaintiffs are Charles Buist, Cheyenne Hunt, Christine Bullock, and Nick Spetsas. Each says they bought a paid individual subscription to Claude, ChatGPT, Grok, and/or Gemini. The defendants named are Anthropic PBC, OpenAI OpCo LLC, SpaceXAI LLC, and Google LLC. None of the four immediately commented.

On the morning of 12 September 2026, Anthropic CEO Dario Amodei published an essay titled We Must Pace the Frontier. The complaint says the essay called for industry-wide coordination and limits on the rate of unchecked AI progress so labs could slow "without sacrificing commercial advantage."

Within about an hour, Elon Musk quote-posted "Dario is right." The same day Sam Altman said he agreed to pace the frontier, and Demis Hassabis called it "the right path forward" and tied it to his proposed industry standards body.

On 14 September, Altman said AI progress "should be slower than it otherwise could be" and that OpenAI would not wait for an antitrust exemption. On 15 September, OpenAI Global Policy Chief Chris Lehane confirmed weeks of collaboration with Anthropic and Google DeepMind.

Public agreement with a safety essay is not a proven cartel. Defendants can still argue First Amendment petitioning, unilateral safety choices, or that no agreement exists.

The proposed nationwide class covers paid U.S. subscribers from 12 September 2026 onward. Plaintiffs say they support AI safety, but they argue safety has to come from each company acting alone or from government regulation, not from a deal among competitors.

That is the same week China called the slowdown warnings fear mongering, and the same conversation as the labs' joint standards-body talks. The lawsuit treats those public yeses as the start of a class period.

Some offers on this page may be paid placements or contain affiliate links.