Anthropic has taken its fight with the Trump administration to court on Monday, taking a new route in what has been described as one of the ugliest battles in the AI business. The company sued after the administration labeled it a security threat and moved to cut off its federal contracts.
The decision by the Trump administration put Anthropic in a category usually linked to hostile foreign players, not a US company creating AI models for both government and commercial work. In its complaint, filed in the Northern District of California, Anthropic argued that the administration acted outside the law and used federal power as punishment after the company pushed back on how the Pentagon wanted to use AI.
Anthropic initiates lawsuit against the Trump administration
The lawsuit named the Defense Department, Defense Secretary Pete Hegseth, Secretary of the Treasury Scott Bessent, Secretary of State Marco Rubio, and Secretary of Commerce Howard Lutnick. Anthropic told the court that the government’s actions threaten one of the fastest-growing private AI companies in the country and could set a dangerous example for other businesses that disagree with Washington.
The company asked the court to rule that the moves were unlawful. The White House hit back fast. A spokeswoman said, “President Trump will never allow a radical-left, woke company to jeopardize our national security by dictating how the greatest and most powerful military in the world operates.” A while after the suit was filed, 37 AI researchers from rivals OpenAI and Google submitted a brief asking the court to side with Anthropic.
The support showed how far this clash has spread beyond one company and one contract. Their filing warned that punishing a leading US AI firm over safety limits could hurt the country’s wider position in artificial intelligence. “If allowed to proceed, this effort to punish one of the leading US AI companies will undoubtedly have consequences for the United States’ industrial and scientific competitiveness in the field of artificial intelligence and beyond,” they said.
Pentagon defends its use of the technology
The brief added more pressure to a case that was already drawing attention across the tech sector. The deeper fight centers on what rules should exist when the Pentagon uses AI systems. During contract talks with the Defense Department, Anthropic wanted clear guarantees that its tools would not be used for mass domestic surveillance or autonomous weapons. The Pentagon rejected that approach.
In its defence, the Pentagon claimed that it follows the law, it would not do those things, and the company should trust the military to use AI in any lawful situation. That disagreement helped blow up formal negotiations, which the Pentagon has since said are over. The fight also spread into politics and trade. The two sides have clashed over Trump’s decision to allow AI chips to be exported to China. There has also been friction over Anthropic’s links to organizations that donated to Democratic causes.
Supporters of Anthropic say the administration’s case looks shaky for another reason: the Pentagon has used Claude in Iran operations, and until recently, Anthropic was the only AI model developer cleared for classified settings. An Anthropic spokeswoman said, “Seeking judicial review does not change our longstanding commitment to harnessing AI to protect our national security, but this is a necessary step to protect our business, our customers, and our partners.”
