US Appeals Court Denies Stay on Pentagon's Anthropic Blacklist
The U.S. Court of Appeals for the D.C. Circuit denied Anthropic's emergency request on April 8, 2026, to block the Pentagon's March 3 designation of the AI company as a supply-chain risk under 41 U.S.C. 4713 and 10 U.S.C. 3252. The blacklist remains in effect, barring Anthropic from new Pentagon contracts and requiring defense contractors to stop using its Claude AI system in military work. A three-judge panel—Judges Henderson, Katsas, and Rao—ruled that the government's national security interests during active military conflict outweigh Anthropic's financial harm. The court expedited oral arguments to May 19.