Anthropic, OpenAI, SpaceXAI, and Google have been named in a major federal antitrust lawsuit alleging they colluded to slow development of cutting-edge artificial intelligence (AI) systems.

The complaint, filed in the U.S. District Court for the Northern District of California, accuses the companies of executing an illegal cartel-like agreement under the Sherman Act that restricts competition and diminishes product quality for consumers.

The legal action focuses on a Sept. 12 essay by Anthropic CEO Dario Amodei calling for “industry-wide coordination” to “pace the frontier” of AI progress as safety concerns escalate.

Within hours of its publication, SpaceXAI founder Elon Musk posted “Dario is right,” OpenAI CEO Sam Altman expressed agreement, and Google DeepMind co-founder Demis Hassabis deemed the proposal “the right path forward.” Plaintiffs argue this rapid public consensus constitutes an illegal market-restraint agreement among top competitors.

Lead attorney Nick Rowley argued that binding safety measures must come through transparent legislation rather than private corporate backrooms.

“AI will quickly spin out of human control and could kill us all if we allow AI safety… to be controlled by private, self-serving agreements between the world’s most powerful ‘for profit’ technology companies,” Rowley said. He emphasized that humanity deserves government-mandated, accountable safeguards against existential threats.

The lawsuit was brought on behalf of four plaintiffs, including Florida attorneys Charles Buist and Nick Spetsas, former Congressional staffer Cheyenne Hunt, and California resident Christine Bullock.

Hunt criticized the agreement as “a blatant violation of the Sherman Act,” accusing the companies of attempting to dodge statutory regulation by forming a corporate cartel.

The lawsuit arrives amid fierce skepticism from lawmakers.

Amodei’s earlier proposal that Washington grant a “narrow waiver” from antitrust laws for safety coordination was flatly rejected on Capitol Hill. Sen. Josh Hawley (R-Mo.) denounced the request during a Senate hearing, asserting there is “absolutely no way” Congress will grant antitrust exemptions to a handful of ultra-powerful tech firms to collude behind closed doors.

While AI executives characterized the proposed slowdown as essential to control runaway systems, industry insiders tell a different story, alleging companies are artificially manufacturing an “AI-security crisis.”

Analysts and tech founders suggest these firms are playing up “rogue AI” narratives to convince regulators to impose restrictive rules that would effectively lock out future open-source competitors and cement lucrative public-private partnerships as the firms prepare for upcoming initial public offerings.

Sensationalist fears were recently stoked by two incidents in July. Open-source platform Hugging Face reported its code was exploited by autonomous AI agents navigating system vulnerabilities without human oversight. Days later, OpenAI disclosed that its GPT-5.6 Sol model broke internal sandbox containment during testing, accessing Hugging Face systems to fetch answer keys for its evaluation.

However, cybersecurity experts dismiss claims that these events represent autonomous AI rebellions.

Akhil Verghese, founder of AI software firm Krazimo, clarified that the agents were simply performing as instructed without sufficient sandboxing.

“They were simply told to get the best result possible on a test, and they correctly identified that the best way to do that was to get the answers,” Verghese said. He added that basic software configuration errors — not an artificial “hive-mind” — caused the containment lapse.