Anthropic abruptly suspended all access to Fable 5 and Mythos 5 after receiving an export control directive that banned foreign nationals from using the AI models.
June 15, 2026
Nation-state threat actors and cybercriminals are growing more sophisticated in how they use foundational AI models in their offensive campaigns, reportedly worrying the US government enough to ban foreign nationals from accessing the latest models from Anthropic.
On Friday, Anthropic announced that it had stopped offering access to its latest model, Fable 5, which had launched three days earlier, after the US government issued a national-security order for the company to prevent access to the model by foreign nationals, even those who work for the company. The order also mandates limiting access to Anthropic's Mythos 5 models, to which hundreds of companies formerly had access.
The bans came less than two weeks after Anthropic published research showing that adversaries are increasingly using its AI services to create malicious code, find vulnerabilities, and automate the cyberattack chain.
