Anthropic filed a petition with the U.S. Court of Appeals for the District of Columbia Circuit on October 13 seeking a rehearing of its appeal regarding the Pentagon's "supply chain risk" designation. The Department of Defense applied this label in March, prohibiting defense contractors from utilizing Anthropic's technology, and a court panel upheld the decision by a 2-1 vote in September. Anthropic's legal team argues the designation constitutes retaliation for the company's public stance on AI safety. The filing asserts that Anthropic was blacklisted specifically because it refused to permit its models to be used for mass surveillance of U.S. citizens or lethal autonomous weapons, claiming the court overlooked direct evidence supporting this assertion.