Anthropic Disables Fable & Mythos AI Models for Foreigners

Anthropic has disabled access to its Fable 5 and Mythos 5 AI models. This happened after the U.S. Commerce Department barred the company from providing these models to any foreign national. This directive includes non-U.S. citizens both abroad and within the U.S., even Anthropic's own employees. Anthropic stated it had no choice but to disable the models for all users. Access to its Claude models, including Claude Opus 4.8, is not affected. Anthropic believes this is a misunderstanding and is working to restore access. The company says the government's decision followed reports of a technique to bypass Fable 5's safeguards, which are meant to prevent access to Mythos's cybersecurity abilities. Anthropic argues this jailbreak is narrow and could apply to other public models like OpenAI's GPT-5.5. This unprecedented directive has drawn disbelief from AI industry insiders. This situation highlights the ongoing tension between AI development and national security concerns.