There is a shadow hanging over this Fable thing

The US government has directed Anthropic to disable access to its AI models Fable 5 and Mythos 5 for all users worldwide, citing national security concerns over a discovered jailbreaking method. Anthropic complied with the order but disagreed with the decision, arguing that the vulnerabilities found are minor, relatively simple, and comparable to capabilities already available in other publicly-available AI models like OpenAI's GPT-5.5.