The U.S. government has imposed restrictions on Anthropic's Claude Fable 5 AI model, a Mythos-class system, after it identified vulnerabilities in classified networks. The move, driven by national security concerns, has led to a shutdown of the model's availability for U.S. customers.

Prediction markets reacted swiftly, with the probability of restoration by July 1 dropping from 62% to 50.5% within 24 hours. However, long-term confidence remains robust, as the odds for restoration by December 31 stand at 97.2%.

The discovery has also sparked debate over the future provision of such advanced AI to government agencies, with market sentiment indicating decreased expectations for near-term adoption.