A federal judge ruled on Thursday, August 27, that the Pentagon’s blacklisting of artificial intelligence startup Anthropic earlier this year was unconstitutional and unlawful retaliation, dealing a blow to the Trump administration’s efforts to penalize the company over its AI safety guardrails.
Judge Rita Lin Rules Pentagon Blacklisting Unlawful and Unconstitutional
In a 59-page ruling issued on Thursday (August 27), U.S. District Judge Rita F. Lin of the District Court for the Northern District of California blocked the Trump administration from blacklisting artificial intelligence startup Anthropic. The court concluded that federal officials had illegally retaliated against the company for constitutionally protected expressive activities
after the company spoke out about how its technology should be used.
Anthropic was illegally blacklisted by the Trump administration, court
The empty invocation of national security is not a blank check to punish and retaliate against government critics,
Judge Rita F. Lin wrote in the ruling. She also wrote that the actions were unlawful retaliation in violation of the First Amendment,
adding that Defense Secretary Pete Hegseth’s decision to designate Anthropic a supply chain risk was arbitrary and capricious. Though the Department of War is undisputedly free to select the AI vendor of its choice, the evidence demonstrates that the broad measures imposed on Anthropic were illegal and baseless.

Judge Rita F. Lin, U.S. District Court for the Northern District of California
The legal showdown stems from a dispute earlier this year when Defense Secretary Pete Hegseth decided to renegotiate all AI labs’ current contracts with the military to allow the Pentagon to use AI for any lawful use,
which would expand the Pentagon’s authority significantly. Most AI labs ended up signing onto the new terms, but Anthropic stood firm on setting two restrictions: not allowing for its AI to be used for mass surveillance of Americans or for lethal autonomous weapons (i.e., AI systems with the power to kill targets without human oversight). Anthropic’s refusal to cooperate kicked off a high-stakes back-and-forth of intensifying pressure on both sides, followed by a bevy of insults from Department of Defense officials and a final ultimatum from the Trump administration.
Escalating Standoff and the Origins of the Supply Chain Risk Designation
Judge Rules Anthropic Blacklisting Was Illegal
Less than 24 hours before that ultimatum, Anthropic CEO Dario Amodei issued a statement that the company wouldn’t change its stance, writing that the company has never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner.
The conflict escalated earlier this year over a USD 200 million contract for Anthropic to provide AI technology to the Pentagon for use on classified systems. Anthropic sought assurances that its technology would not be used for mass surveillance of Americans or autonomous lethal weapons, while the Pentagon argued that a private company could not dictate policy to the US government.
Anthropic filed two federal lawsuits against the Trump administration alleging that Pentagon officials illegally retaliated against the company for its position on artificial intelligence safety. Defense Department officials designated Anthropic a supply chain risk, citing national security concerns. The lawsuit says the administration’s decision to place the firm on what is effectively a blacklist that blocks Pentagon suppliers from using Claude is an attempt to punish the company over its AI guardrails.
The federal government retaliated against a leading frontier AI developer for adhering to its protected viewpoint on a subject of great public significance — AI safety and the limitations of its own AI model — in violation of the Constitution and laws of the United States,the lawsuit states, adding that Trump officialsare seeking to destroy the economic value created by one of the world's fastest-growing private companies.
Broader Tech Industry Impact and Ongoing Legal Battles
The ruling resolves the first of two lawsuits Anthropic filed in March challenging the Trump administration’s actions against the company. The second case, filed in the US Court of Appeals for the District of Columbia Circuit, remains ongoing. The Trump administration could appeal Judge Lin’s decision or wait for a ruling in the separate case before deciding its next steps, according to a person familiar with the matter.
Reuters reports that the ruling could have broader implications for how the government engages with tech companies. Anthropic welcomed the decision, expressing gratitude for the court’s swift action and emphasizing its commitment to working productively with the government to ensure safe AI usage. The Pentagon had previously praised Anthropic as a partner, but the relationship soured after the company raised concerns about the potential misuse of its technology. The ruling may impact ongoing legal battles, including a separate case in the federal appeals court in Washington, D.C.
In a statement, Anthropic said it was pleased the court has ruled that this supply-chain-risk designation was unlawful.
We remain focused on working productively with the government to harness A.I. for our national security so all Americans benefit from this technology,
the statement reads.
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