OpenAI, Google, Anthropic, SpaceXAI sued over alleged pact

Four paying AI users sued OpenAI, Anthropic, Google and SpaceXAI on Sept. 20, 2026, alleging an agreement to slow advanced AI development, raising antitrust concerns.

Reaction pending.

Alleged pact among four firms

Court filings on Sept. 20, 2026, said the plaintiffs — described as paying customers of advanced AI services — alleged the companies coordinated to slow the pace of developing more capable AI models. The complaint frames the conduct as a horizontal agreement that, the plaintiffs say, restrained competition and harmed purchasers.

The filings outline the plaintiffs' view of the alleged coordination and seek relief in federal court. The complaint alleges the coordination affected how quickly features and capabilities reached paying users; it frames the matter as a violation of US antitrust law and a harm to market entry and innovation.

If defendants follow a standard 21‑day federal response window from the filing date, initial answers or motions would be due by October 11, 2026; watch for those filings on or before that date as the first procedural signal of how the companies will respond.