Federal judge questions evidence behind U.S. ban on Anthropic’s AI technology

A federal judge has raised concerns about the Trump administration’s evidence supporting its attempt to label Anthropic a supply-chain risk and ban federal agencies from using its AI technology. During a hearing on July 29, 2026, U.S. District Judge Rita Lin questioned the government’s justification, stating it had not presented enough evidence to support the designation.

The dispute originated from stalled contract negotiations between Anthropic and the Department of Defense (DOD). Anthropic has argued that its AI technology is not prepared for military applications, including mass surveillance, targeting, or lethal decision-making. The company also emphasized that it did not intend for its models to be used in such contexts. The DOD, however, asserted that a private company should not dictate how the military uses available technologies, claiming it would use the tools in 'lawful' ways.

The government’s legal argument included the claim that Anthropic’s public criticism of the DOD justified the ban. Judge Lin criticized this logic, calling it 'really troubling' and warning that it could establish a precedent for punishing federal contractors who disagree with administration policies. The judge also addressed the DOD’s assertion that Anthropic could disable or alter its AI models during warfighting operations, noting that experts had stated there was no evidence to support this claim. Lin agreed, stating she had seen no proof that Anthropic could alter a delivered model or 'flip some kind of kill switch.'

The hearing was part of one of two lawsuits filed by Anthropic against the DOD in March 2026, challenging both the ban and the supply-chain risk designation. The second lawsuit is being heard in Washington. Judge Lin had previously issued a temporary block on the ban in March 2026, and is now considering whether to make that order permanent.