Anthropic is asking a federal court in Washington, D.C. to rehear its appeal regarding the Pentagon’s blacklisting of the company’s AI models. The Defense Department, led by Pete Hegseth, labeled Anthropic a supply chain risk in March, blocking defense contractors from using its technology. In September, the D.C. Circuit upheld the Pentagon’s decision in a 2-1 ruling, rejecting Anthropic’s argument that the ban was arbitrary, unauthorized and unconstitutional. The company claims the designation was retaliation for its public speech about AI safety commitments. Anthropic signed a $200 million contract with the Pentagon in July 2025.
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