A federal judge has ruled against the Pentagon in a legal challenge brought by the artificial intelligence company Anthropic. The court order effectively blocks the Department of Defense from moving forward with plans to blacklist the firm, a move that would have restricted the company’s ability to secure government contracts and collaborate on federal projects.

In the ruling, the judge determined that the Pentagon’s decision to blacklist Anthropic was not based on legitimate security concerns or contractual failures, but rather served as a form of retaliation. The court found that the agency’s actions were an illegal response to the company’s public criticism of government AI regulations and oversight policies. By using its procurement power to penalize a private entity for its speech, the Pentagon violated established administrative procedures and constitutional protections regarding free expression.

This decision marks a significant moment in the ongoing tension between the tech industry and federal regulators. While the Pentagon has historically maintained broad discretion in determining which firms are eligible for defense-related work, this ruling establishes a clear boundary: government agencies cannot use blacklisting as a tool to silence or punish companies that voice dissent against federal policy. The Department of Defense has not yet indicated whether it will appeal the decision, but for now, Anthropic remains eligible to participate in government bidding processes.