Anthropic pulls Fable 5 and Mythos 5 for everyone after government order

Late Friday evening, the government ordered Anthropic to block access to its Fable 5 and Mythos 5 models for all foreign nations—both inside and outside the US—citing national security concerns. That order didn’t just apply to customers. It included Anthropic’s own employees.

To comply, the company has completely cut off access to both models for everyone. No phased rollout, no exceptions. Just a hard block.

In a statement, Anthropic said it’s following the order, but the government “did not provide specific details of its national security concern.” Instead, any evidence of potential jailbreak was delivered verbally, and the vulnerabilities described were apparently minor—and available via other models anyway.

This is the kind of move that makes you wonder who’s really in control here. The government can shut down a major AI model globally based on a verbal briefing? No written evidence, no public transparency, just a Friday night order and a company scrambling to comply.

Anthropic’s situation is tricky. They’re trying to be the responsible AI company, the one that plays by the rules. But when the rules are handed down like this, with no detail and no due process, “responsible” starts to look a lot like “compliant without question.”

The bigger question is what this means for the rest of the industry. If the government can shut down Fable 5 and Mythos 5 on a whim, what’s stopping them from doing the same to GPT-6 or Gemini Ultra tomorrow? And if the vulnerabilities are truly minor and available elsewhere, what’s the actual security concern here?

I’ve been watching this space long enough to know that national security is sometimes used as a catch-all excuse. But without specifics, it’s impossible to judge whether this is a legitimate threat or an overreach. Either way, Anthropic’s customers are left in the dark, and the company’s reputation for transparency takes another hit.

For now, if you were relying on Fable 5 or Mythos 5 for anything, you’re out of luck. And you probably won’t get a straight answer as to why.