US District Judge Rita F. Lin issued a preliminary injunction on 26 March 2026, blocking the Pentagon from designating Anthropic as a supply chain risk to national security. The ruling pauses the Trump administration's directive banning all federal agencies from using Claude models while the legal battle plays out in San Francisco federal court.
The dispute centres on how Claude can be used by the military. The Department of Defense wanted Anthropic to grant the Pentagon unfettered access to its models across all lawful purposes. Anthropic drew two red lines: it would not allow its AI systems to be used in fully autonomous weapons or domestic mass surveillance. When Anthropic made those objections public, the Pentagon moved to blacklist the company.
Judge Lin's ruling was forceful. She wrote that nothing in the governing statute supports the Orwellian notion that an American company may be branded a potential adversary and saboteur of the US for expressing disagreement with the government. She described the Pentagon's action as classic illegal First Amendment retaliation for Anthropic bringing public scrutiny to the government's contracting position.
The case has broader implications for every AI company navigating government contracts. Anthropic's willingness to sacrifice a major revenue stream over ethical principles — and a federal judge backing that position — sets a precedent that could shape how AI companies negotiate military and government use of their models for years to come.
