The U.S. Department of Defense has authorized limited exemptions to continue using Anthropic's artificial intelligence tools beyond a mandated six-month phase-out period for mission-critical national security operations, according to an internal memo dated March 6, 2026.
Operational Flexibility Amid Phase-Out
The policy adjustment permits senior Pentagon leaders to request exemptions in "rare and extraordinary circumstances" where no viable alternatives exist. Units must submit comprehensive risk mitigation plans for approval, particularly for systems supporting nuclear weapons and ballistic missile defense.
Contractor Compliance Challenges
The memo reaffirms that the ban extends to defense contractors, requiring certification of compliance within 180 days. Government contracts lawyer Franklin Turner noted the difficulty of eliminating Anthropic's open-source code from supply chains, predicting a surge in waiver requests.
Legal and Strategic Implications
This development follows Defense Secretary Pete Hegseth's designation of Anthropic as a supply chain risk in February 2026. The company filed a lawsuit on March 9 seeking to block the ban, creating parallel legal and operational challenges for military planners.
