The Pentagon has moved at least two-thirds of its AI workload away from Anthropic and toward rival providers, marking one of the most dramatic vendor shake-ups in the Defense Department’s short but intense history with commercial AI.
The shift follows a months-long dispute between the DoD and Anthropic over acceptable use policies for Claude, the company’s flagship AI model. What started as a contract negotiation escalated into a full-blown standoff over where to draw the line between AI safety principles and national security demands.
How the rift unfolded
The backstory starts in July 2025, when the Pentagon awarded $200 million contracts each to Anthropic, OpenAI, Google, and xAI for AI prototyping work.
Things started to unravel in early 2026. The Pentagon pushed Anthropic to permit its models for unrestricted lawful uses, a category that reportedly included mass surveillance capabilities and autonomous weapons deployment without human oversight. Anthropic CEO Dario Amodei declined.
