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AI Giants Hit With Antitrust Suit Over Slowdown Calls

A class action in California accuses Anthropic, OpenAI, xAI and Google of antitrust violations over their calls to slow AI development. Gary Marcus called the suit clever in detail but foolish in the big picture.

2026-09-19 ~ 2026-09-20 · 2 episodes · 22 posts

Episode 1 · Anthropic, OpenAI, xAI, Google Sued for Alleged Antitrust Conspiracy to Slow AI (2026-09-19, 20 posts)

According to Politico, a civil lawsuit filed in the US District Court for the Northern District of California names Anthropic, OpenAI, xAI (referred to as SpaceXAI in some reports), and Google as defendants, alleging that these top AI companies—which should be competing with each other—engaged in illegal coordination among rivals by jointly calling for a coordinated slowdown of frontier AI development ("pace AI development"), in violation of US antitrust law.

Confirmed

  • The lawsuit was filed in the US District Court for the Northern District of California, with the four leading AI companies—Anthropic, OpenAI, xAI, and Google—as defendants, as reported by Politico.
  • The core allegation is "illegal coordination": plaintiffs argue that these competitors' joint calls to "pump the brakes" on AI development amount to collusion under antitrust law.
  • User @PeterHndrsn shared a link to the antitrust complaint, confirming the filing is now public.

Why it matters

  • As @PeterHndrsn noted, the suit confirms what many had predicted: AI companies participating in so-called "pacing the frontier" (deliberately controlling the release cadence of frontier models) would eventually face legal exposure for it.
  • If the allegations stand, any coordination among leading companies on compute or model release timing could come under renewed scrutiny, drawing a legal red line for public appeals and collaboration across the industry.

Episode 2 · Gary Marcus Slams AI Antitrust Lawsuit as Clever in Details, Foolish in Scope (2026-09-20, 2 posts)

Gary Marcus, after reading the full complaint, called an AI antitrust lawsuit clever in details but foolish in the big picture. He argued that penalizing companies for slowing model development over safety concerns misuses antitrust law, and forcing faster releases could squeeze AI safety.