U.S. District Judge Rita Lin issued a preliminary injunction halting the Pentagon's designation of Anthropic as a national security supply-chain risk, ruling the move was likely unlawful retaliation for the company's refusal to remove AI safety guardrails for military use.

Anthropic's lawsuit against the Pentagon over its 'supply chain risk' designation gained new momentum as the ACLU and CDT filed an amicus brief, arguing the designation unlawfully punishes the company's First Amendment-protected AI safety advocacy.