Days after Anthropic unveiled its highly anticipated AI model with Mythos-level capabilities, Claude Fable 5, the model may soon become inaccessible to many users worldwide. On Friday, Anthropic announced that it was disabling access to its latest models, Fable 5 and Mythos 5, following a US government export control directive requiring the company to suspend access for all foreign nationals over national security concerns.

In its statement, the company said it was ordered to restrict access without being provided an evidence-backed rationale for the US government’s concerns. According to Anthropic, officials believe that there may be a way to bypass or jailbreak the safety mechanism deployed into Fable 5, which potentially allows it to be used to identify software vulnerabilities.