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Justice Department Challenges Decision Stopping Anthropic AI Ban

By  |  April 2, 2026

The Trump administration is preparing to challenge a federal court decision that halted its attempt to ban the government’s use of artificial intelligence developed by Anthropic PBC, according to Bloomberg.

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    The Justice Department filed a notice on Thursday signaling its intent to appeal last month’s ruling by US District Judge Rita F. Lin. The judge, based in San Francisco, had temporarily blocked the administration’s plan to cut ties with Anthropic while the case proceeds. However, she also delayed enforcement of her order for one week to allow the government time to seek appellate review.

    Anthropic initiated the lawsuit after the Defense Department declared that the company’s technology posed a potential threat to the US supply chain. That designation triggered efforts to prohibit federal agencies from using its AI systems. The dispute is part of a broader legal battle, as a separate but related case involving Anthropic is already under consideration by a federal appeals court in Washington, according to Bloomberg.

    Related: US Judge Questions Pentagon Blacklisting of Anthropic in AI Dispute

    In her March 26 decision, Judge Lin expressed skepticism about the administration’s justification for the ban. While officials cited national security concerns, she indicated that the reasoning appeared inconsistent with the evidence presented. According to Bloomberg, Lin suggested the action may have been motivated by the company’s stance on limiting how its technology is used.

    The judge wrote that the move seemed “designed to punish” Anthropic after it sought assurances that its AI tools would not be deployed for domestic surveillance or autonomous weapons programs.

    The case, filed as Anthropic v. US Department of War in the Northern District of California, now heads toward a potential appellate showdown that could have broader implications for how the federal government regulates and partners with artificial intelligence providers.

    Source: Bloomberg