# DoD Ends Anthropic AI Use

The Department of Defense said it had stopped operational use of Anthropic products after the D.C. Circuit upheld the Pentagon’s supply-chain-risk designation on September 25, 2026. DoD had designated Anthropic a national-security supply-chain risk in February and announced a phaseout by late August. A separate California ruling against broader federal restrictions remains in place, leaving the legal position mixed and further review possible. The signals report no new solicitation, contract value, or replacement award tied to the change.

- Defense contractors should review whether Anthropic products are embedded in systems, subcontractor services, or defense-program workflows and assess related supply-chain and security dependencies.
- The designation makes supply-chain eligibility and acceptable-use terms material considerations for AI providers seeking defense work; companies should verify applicable contract requirements before changing program plans.
- No alternative award or procurement timeline is identified in these signals, so the reported shift does not establish a specific near-term opportunity for competing AI suppliers.
- The D.C. Circuit ruling supports DoD’s exclusion of Anthropic from its systems and defense contract work, while the separate California ruling and potential further review leave broader federal restrictions unsettled.

**Jurisdictions:** federal
**Industries:** Defense & Military, Information Technology
**Topics:** Artificial Intelligence, Cybersecurity, Regulatory Compliance
**Published:** October 08, 2026

### Government Entities
- U.S. Department of Defense (DoD)
- U.S. Court of Appeals for the D.C. Circuit (D.C. Circuit)
- U.S. District Court in California

### Vendors
- Anthropic (incumbent)

### Sources
- [Pentagon stops using Anthropic's AI tools, months after declaring it a supply chain risk - The Times of India](https://timesofindia.indiatimes.com/world/us/pentagon-stops-using-anthropics-ai-tools-months-after-declaring-it-a-supply-chain-risk/articleshow/134714380.cms) - The Times of India
- [DOD Halts Use of Anthropic AI After Court Upholds Supply Chain Risk Designation – MeriTalk](https://www.meritalk.com/articles/dod-halts-use-of-anthropic-ai-after-court-upholds-supply-chain-risk-designation) - MeriTalk
- [The @DeptofWar halts us of @AnthropicAI models,  following a federal appeals court ruling that allows the Pentagon to exclude Anthropic from its systems and defense contract work. https://t.co/d2KdfQY4r8](https://x.com/MeriTalk/status/2107587832764137489) - twitter-defense