"Anthropic delivered a master class in arrogance and betrayal as well as a textbook case of how not to do business with the United States Government or the Pentagon," Hegseth posted on X.

"America's warfighters will never be held hostage by the ideological whims of Big Tech," the Pentagon chief said.

He also said he was directing the Defense Department to declare Anthropic a "supply-chain risk," and that "no contractor, supplier, or partner that does business with the United States military may conduct any commercial activity with Anthropic."