
A federal judge blocked the Pentagon's attempt to blacklist AI company Anthropic.
The judge ruled the designation was illegal retaliation.
This stems from a dispute over a $200 million military contract.
What happened
A federal judge in California, Rita Lin, vacated the Pentagon's February 27 decision to label Anthropic a supply-chain risk and make it ineligible for federal contracts. The ruling also lifted a punitive measure barring military contractors from doing business with Anthropic, and removed sanctions improperly imposed by nine agencies including the Pentagon, Treasury, State, and Homeland Security.
Why it matters
The ruling found the designation was unconstitutional retaliation and called it "arbitrary, capricious, an abuse of discretion, and otherwise not in accordance with law." The case stems from a dispute over a $200 million deal for Anthropic's Claude models, which broke down after Anthropic insisted on limits regarding lethal autonomous weapons and mass surveillance, while Defense Secretary Pete Hegseth rejected any curbs.
What to watch
The Pentagon is expected to appeal. The judge affirmed the Pentagon is not required to use Anthropic's models, and the ruling does not prevent it from choosing other models. Anthropic's separate DC lawsuit is still ongoing.
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The conflict began after reports that Claude was used in the operation to capture Venezuelan president Nicolás Maduro. A Palantir employee relayed concerns from an Anthropic staffer to US officials about how the models were used. This led to a breakdown in negotiations over the $200 million deal, with Hegseth widely seen as punishing Anthropic for its stance on usage limits.
The judge found the Pentagon's stated justification — that giving Anthropic access to classified systems would introduce "unacceptable risk" — inconsistent with ongoing collaboration. Lin pointed out that the government is discussing collaboration with Anthropic on its new model, Mythos, in sensitive contexts, which contradicts the claim that Anthropic is a saboteur. This suggests the designation was retribution rather than genuine security concern, a view supported by the court's ruling.
While Anthropic's top models are considered some of the best in the world and are subject to the Trump administration's AI oversight framework, the immediate legal battle is not over. The Pentagon is expected to appeal, and the DC case remains open. The ruling clears Anthropic of the immediate federal contracting ban but does not force the Pentagon to use its models, leaving the commercial relationship uncertain.
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