Prediction market odds on the Pentagon banning Anthropic's Claude AI model spiked dramatically following the company's public refusal to comply with U.S. military demands to remove safety guardrails for mass surveillance and autonomous weapons systems. On February 26, 2026, after Anthropic CEO Dario Amodei rejected a final Pentagon ultimatum, the probability of a ban by March 31 surged from a baseline of 15-27% to a peak of 49% on Polymarket, representing a 30% jump.
The Pentagon had awarded Anthropic approximately $200 million in July 2025 for AI national security tools. However, the Defense Department later demanded the removal of key safety restrictions, specifically those prohibiting the use of Claude for "mass surveillance of Americans" and "autonomous lethal weapons." Amodei publicly refused in a letter, stating, "These threats do not change our position. We cannot in good conscience accede." He argued that Claude was not technically capable of safe deployment for autonomous weapons and that such use could lead to life-or-death mistakes.
The Pentagon responded with threats, including a potential ban on Claude's use, invocation of the Defense Production Act (DPA) to force compliance, and blacklisting Anthropic from future defense contracts. Reports suggest other AI companies, including xAI, OpenAI, and Google, had agreed to similar Pentagon requests, leaving Anthropic standing alone in its refusal.
The Polymarket contract, titled "Will Pete Hegseth ban Claude by March 31?" saw trading volume reach between $303,000 and $318,000, significant for a niche policy question. The market acted as a real-time oracle, with traders instantly pricing in the heightened political risk following Amodei's rejection.
However, the high odds were short-lived. Within hours, the probability corrected sharply, falling to 34% and eventually settling around 13% by press time—a more than 70% drop from the peak. This correction indicates traders ultimately doubted the Pentagon would follow through on its ban threat, likely due to the military's reliance on advanced AI and Claude's top-tier capabilities. The market now prices an 87% chance that a ban will not occur, betting on a pragmatic compromise or the Pentagon quietly dropping its demands.
