Appeals Court Rejects Anthropic’s Bid to Halt Pentagon’s Supply Chain Risk Designation

A federal appeals court has dealt a significant blow to Anthropic's legal challenge against the Pentagon, refusing to temporarily block the Department of Defense's designation of the company as a supply chain risk^[1][2]. The U.S. Court of Appeals in Washington, D.C., rejected the AI laboratory's emergency request on Wednesday, April 8, allowing the blacklisting to remain in effect while litigation continues^[1].

The appeals court acknowledged that Anthropic would "likely suffer some degree of irreparable harm" from the designation, yet concluded that "the equitable balance here cuts in favor of the government"^[2]. In its four-page ruling, the panel weighed Anthropic's financial concerns against what it described as the government's need to manage access to critical AI technology during an active military conflict^[2]. The court noted that while the company faces potential irreparable harm, the "precise amount of Anthropic's financial harm is not fully clear," providing insufficient grounds to overturn the Pentagon's actions^[1].

The ruling creates a stark legal contradiction: while the appeals court upheld the Pentagon's blacklisting, a separate judge in San Francisco issued a preliminary injunction last month preventing the Trump administration from enforcing a broader ban on Anthropic's Claude model^[3]. That earlier decision by U.S. District Judge Rita Lin found that the Trump administration had overstepped its authority by labeling Anthropic unqualified to work with military contractors—a ruling that prompted the administration to remove stigmatizing labels and allow government employees and contractors to continue using Claude^[1]. The split decisions leave the company's status in legal limbo: Anthropic remains excluded from Department of Defense contracts but can engage with other federal agencies^[3].

The underlying dispute centers on how the Pentagon can deploy Claude in fully autonomous weapons and surveillance operations^[1]. Anthropic has contended that the Pentagon's actions are unconstitutional and retaliatory, asserting a First Amendment violation^[3]. The company's legal team warned the appeals court that the blacklist designation had already caused financial losses and threatened broader reputational damage to its business^[2].

U.S. Attorney General Todd Blanche declared the appeals court decision a victory for military readiness, asserting that military authority rests with the government rather than a tech company^[3]. The Pentagon designated Anthropic a supply chain risk in March, asserting the company posed a national security threat^[3].

The legal battle is far from over. The appeals court urged prompt resolution of the case due to the potential harm to Anthropic, with further evidence scheduled to be presented at a hearing on May 19^[1]. Anthropic responded to the ruling by expressing gratitude that the court recognized the urgency of the matter while reiterating confidence that courts would ultimately find the supply chain designations unlawful^[1].