Anthropic appeals Pentagon’s blacklisting of its AI models in D.C. court
Anthropic filed a petition on Tuesday asking a federal court in Washington, D.C. to rehear its appeal of the Pentagon’s blacklisting of its AI models. The company argues the Department of Defense’s designation as a national-security ‘supply chain risk’ was retaliation for its public stance on AI safety. The Pentagon had blocked defense contractors from using Anthropic’s technology after…
Key points
- Anthropic filed a petition on Tuesday to rehear its appeal of the Pentagon’s blacklisting of its AI models
- Pentagon blocked defense contractors from using Anthropic’s technology after negotiations over Claude models collapsed in September 2025
- Anthropic argues the blacklisting was retaliation for its public stance on AI safety and refusal to allow military use for surveillance or lethal warfare
The Pentagon initially labeled Anthropic a risk in March, citing its refusal to allow use for mass surveillance or lethal autonomous warfare. A $200 million contract signed with the Pentagon in July 2025 preceded the breakdown. A divided D.C. Circuit panel upheld the blacklisting in September, rejecting Anthropic’s claim that the ban was arbitrary. The company’s attorneys now contend the court overlooked evidence of retaliation for its AI-safety advocacy. Neither side has commented beyond the filing.
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Anthropic urges court in Washington, D.C. to rehear appeal of Pentagon blacklisting
CNBC Technology · 13 October 2026
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