An Anthropic legal battle with the Trump administration reached a turning point on Thursday, when a judge ruled that the Pentagon’s decision to blacklist the AI lab earlier this year was unconstitutional. The ruling marked a significant victory for the company after months of escalating conflict with federal officials.
The lawsuit, lodged in March at a California district court, alleged that the administration had unlawfully retaliated against Anthropic for establishing “red lines”, or unacceptable military applications for its AI technology. Judge Rita F. Lin, sitting in the northern district of California, wrote that “the empty invocation of national security is not a blank check to punish and retaliate against government critics.”
Judge Lin described the measures as “unlawful retaliation in violation of the First Amendment”. She added that Defence Secretary Pete Hegseth’s decision to designate Anthropic a supply chain risk “was arbitrary and capricious”, noting that while the department remained free to choose its preferred AI vendor, the broad measures imposed on the company were “illegal and baseless.”
How the Dispute Began
The confrontation started during the winter, when Hegseth moved to renegotiate the existing military contracts held by AI labs, seeking to permit the Pentagon to use AI for “any lawful use”. This would have expanded the department’s authority considerably. Most AI labs accepted the revised terms, but Anthropic maintained two restrictions: it would not allow its AI to be used for the mass surveillance of Americans, nor for lethal autonomous weapons, meaning AI systems capable of killing targets without human oversight.
Anthropic’s refusal triggered an intensifying exchange between the two sides, followed by criticism from Department of Defence officials and a final ultimatum from the administration. Less than 24 hours before that deadline, Anthropic chief executive Dario Amodei issued a statement confirming the company would not alter its position. He wrote that Anthropic had “never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner”, but that in a “narrow set of cases, we believe AI can undermine, rather than defend, democratic values.”
Legal Challenge and Ruling
Following that statement, Anthropic was labelled a supply chain risk, a classification typically reserved for national security threats. The Pentagon then moved to sign deals with seven other AI labs, including Google, Microsoft, OpenAI and SpaceX. Anthropic responded with its lawsuit, and in March Judge Lin sided with the company, temporarily blocking the blacklist.
In that earlier order, Lin wrote that departmental records showed Anthropic had been designated a supply chain risk because of its “hostile manner through the press”, adding that “punishing Anthropic for bringing public scrutiny to the government’s contracting position is classic illegal First Amendment retaliation.”
In a statement on Thursday, Anthropic spokesperson Danielle Ghiglieri said the company welcomed the ruling that the designation was unlawful, adding that Anthropic remained “focused on working productively with the government to harness AI for our national security so all Americans benefit from this technology.”
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Image: theverge.com
