Defense Department says Anthropic poses ‘unacceptable risk’ to national security

In its filing, the department explained that its secretary, Pete Hegseth, had a provision incorporated into AI service contracts, allowing the agency to use their technologies for any lawful purpose. Anthropic refused its terms and apparently, the company’s behavior caused the Pentagon to question whether it truly was a “trusted partner” that it could work with when it comes to “highly sensitive” initiatives. “After all, AI systems are acutely vulnerable to manipulation, and Anthropic could attempt to disable its technology or preemptively alter the behavior of its model either before or during ongoing warfighting operations, if Anthropic — in its discretion — feels that its corporate “red lines” are being crossed,” the Pentagon wrote in its filing. “DoW deemed that an unacceptable risk to national security,” it added, referring to the agency as the Department of War, which is the Trump administration’s preferred name for it.

It was due to those concerns that President Trump ordered federal agencies to stop using its technology, the filing reads. The company is asking the court to issue a preliminary injunction and put a pause on a ban while it’s challenging its supply chain risk designation in court. While Anthropic’s clients could continue working with the company on non-defense-related projects, it says the label could cause it to lose billions of dollars in revenue. It’s not quite clear if Anthropic is still trying to reach a new deal with the government, as was reported before it filed its lawsuit. As The New York Times notes, Microsoft, Google and OpenAI had filed friend-of-the-court briefs in support of Anthropic since then.