A federal appeals court in Washington on April 8 denied Anthropic's emergency motion to immediately halt the Pentagon's blacklisting of its Claude AI models from U.S. military contracts. The ruling means the Department of Defense's supply chain risk designation remains in force during litigation, with oral arguments expedited to May 19, 2026. The decision could reshape U.S. government AI procurement policy.
Background: Negotiation Breakdown and Safety Constraints
The designation stems from a breakdown in negotiations between Anthropic and Pentagon officials in late February 2026. At issue were two restrictions in Anthropic's terms of service: a ban on fully autonomous weapons systems, including armed drone swarms operating without human oversight, and a prohibition on mass surveillance of U.S. citizens. Emil Michael, Undersecretary for Research and Engineering, called these restrictions "irrational obstacles" to military competitiveness, particularly against China. Officials cited programs like the Golden Dome missile defense initiative and the need for rapid response capabilities against hypersonic threats.
Anthropic offered limited, case-by-case exceptions but refused to eliminate the core safety guardrails, citing reliability concerns with current AI for high-stakes autonomous decisions. Talks collapsed. President Trump then directed all federal agencies to stop using Anthropic's technology, with a six-month phase-out for existing deployments. Defense Secretary Pete Hegseth issued a supply chain risk designation, an action typically applied to foreign entities like Huawei. The label required contractors, including Amazon, Microsoft, and Palantir, to cease using Claude in any DoD-tied work. Anthropic called the move an "unlawful campaign of retaliation" for its refusal to let the government override its AI safety policies.
Court Rulings: Balancing Harms and Procedural Split
In a four-page order, a panel of D.C. Circuit judges Gregory Katsas and Neomi Rao acknowledged Anthropic would "likely suffer some degree of irreparable harm," citing financial and reputational damage. However, they concluded the balance of equities favored the government, citing judicial management of how the Pentagon secures AI technology "during an active military conflict."
Simultaneously, on March 26, U.S. District Judge Rita F. Lin in California granted a preliminary injunction in favor of Anthropic, ruling that the administration's actions appeared more punitive than protective, lacked sufficient statutory justification, and overstepped authority. That order temporarily lifted enforcement of the designation, allowing government and contractor use of Claude to continue pending full litigation. The Trump administration appealed to the Ninth Circuit. The procedural split between the two courts highlights different statutory frameworks being reviewed.
Industry observers flagged the case as a warning sign for U.S. AI development. Matt Schruers, CEO of the Computer and Communications Industry Association, said the Pentagon's actions and the D.C. Circuit ruling "create substantial business uncertainty at a time when U.S. companies are competing with global counterparts to lead in AI."
What's Next: May 19 Oral Arguments
The case now moves toward the expedited May 19 oral argument in the D.C. Circuit, with the Ninth Circuit appeal still pending. The outcome will likely define the limits of federal power to designate domestic AI firms as national security risks and determine how far the government can go in pressuring private companies to alter their AI safety policies.
Anthropic said in a statement that it remains confident in its position: "We're grateful the court recognized these issues need to be resolved quickly and remain confident the courts will ultimately agree that these supply chain designations were unlawful." The legal battle over Claude AI's military use underscores the growing tension between AI safety advocacy and national security demands, with potential ripple effects for the broader tech industry.