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Anthropic lost one part of its fight with the Department of Defense and won another: a federal appeals court upheld a Defense Department procurement exclusion, while a California district court ruled against broader government actions. The cases addressed different legal questions, so neither ruling settled the entire dispute.
What sparked the dispute?
The disagreement was about whether the Department could require unrestricted access to Anthropic’s Claude models for lawful military purposes, or whether Anthropic could retain limits on certain uses. Anthropic said its exceptions were for fully autonomous weapons and mass domestic surveillance. CEO Dario Amodei said the company did not seek a role in military operational decisions; that is Anthropic’s account of its policy, not a court finding.
Secretary Pete Hegseth’s directive stated that “the Department of War must have full, unrestricted access to Anthropic’s models for every LAWFUL purpose in defense of the Republic.” The quoted sentence appears in the California court record and describes the department’s position.
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How did the dispute unfold?
- July 2025: The Congressional Research Service reported that the Department announced awards of up to $200 million each to Anthropic, Google, OpenAI, and xAI to accelerate national-security AI adoption. These were award ceilings, not evidence that each company received that amount.
- February 2026: The parties clashed over Anthropic’s use restrictions and the Department’s demand for access for “all lawful purposes.” Some operational details in the Congressional Research Service account are reported rather than officially established.
- February 27, 2026: President Trump directed federal agencies to cease using Anthropic technology. Secretary Hegseth also directed a supply-chain-risk designation and announced a bar on contractors, suppliers, and partners doing commercial activity with Anthropic.
- March 4–9, 2026: Anthropic received its formal designation letter on March 4. On March 9, the company filed a civil action in the Northern District of California and a petition in the D.C. Circuit, challenging different government actions under different legal theories.
Why did the courts reach different outcomes?
The two courts considered separate measures. The California case challenged broader presidential and departmental actions, including constitutional and Administrative Procedure Act claims. The D.C. Circuit case concerned a procurement exclusion under the Federal Acquisition Supply Chain Security Act of 2018 (FASCSA). The rulings therefore are not a single court issuing contradictory answers to the same legal question.
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| Legal track | What the court considered | Decision and reasoning | Practical scope described in the sources |
|---|---|---|---|
| Northern District of California August 27, 2026 |
Anthropic’s challenge to broader government actions, including claims under the First Amendment, due process, and the APA, as well as the designation challenged under 10 U.S.C. § 3252. | The court granted Anthropic summary judgment on its claims. Its order said the administrative record was “slim” and did not substantiate the government’s stated risk rationale; it concluded the broad penalties rested principally on Anthropic’s criticism of the administration’s views rather than evidence that the company would sabotage its model. | The order ruled against the broad challenged actions. It also said the Department remained free to choose its AI vendor. |
| D.C. Circuit September 25, 2026 |
Whether the Department could exclude Claude from its supply chain under FASCSA. | In a 2–1 decision, the court upheld the exclusion. The majority found the Department’s determination reasonable and said a potential for Anthropic to limit Claude’s performance in ways the Department considered necessary and contractually authorized could qualify as a supply-chain risk, even without proof of malicious intent. Judge Gregory G. Katsas wrote: “The Department reasonably feared that Anthropic might manipulate Claude’s design to prevent it from performing national-security functions that the Department deems contractually authorized and necessary.” | The Associated Press reported that the ruling allowed the Department to continue removing Claude from its systems and to bar its use for Defense Department work. |
What did Anthropic say it would not allow?
In its March 5, 2026 statement, Anthropic said its exceptions were “fully autonomous weapons and mass domestic surveillance.” Amodei described these as high-level use areas rather than limits on operational decision-making. He also said the company understood the formal designation to apply only to Claude used directly as part of Department of War contracts. That account of the designation’s reach is Anthropic’s interpretation, not a neutral judicial holding.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is the status, and what remains unresolved?
The latest ruling covered here is the D.C. Circuit’s September 25, 2026 decision. It upheld the FASCSA procurement exclusion, while the California court had separately ruled against broader challenged actions on August 27. The available court orders and reporting do not establish whether either judgment was stayed, appealed further, or modified after those dates, or fully explain how the orders interact in practice. As a result, these rulings do not establish one uniform, final answer about every federal agency, contractor, supplier, or partner’s obligations.
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