Anthropic has disabled all access to its recently introduced AI models, Fable 5 and Mythos, on Friday, June 12, 2026.
The move comes after the US Department of Commerce raised national security concerns about its exports to foreign citizens.
Anthropic issued a statement on its website and said it was ordered to suspend foreigners from using Claude Fable 5, a program the company self-described as “too powerful.”
“The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all of our customers to ensure compliance,” the AI company added.
Claude Fable 5 is a version of Anthropic’s Claude Mythos, a competitor to rival AI models like OpenAI’s ChatGPT and Google’s Gemini.
However, Anthropic highlighted that US national security officials had not discovered the specific concerns.
“It is our understanding that the government believes it has realized a method to bypass or ‘jailbreak’ Fable 5,” the company wrote.
For context, Anthropic and the Trump administration have been at odds for quite some time.
Both sides have been involved in a legal fight over an order to restrict the use of Anthropic’s powerful artificial intelligence tools by government agencies.
Anthropic is filing a lawsuit against the Pentagon after Defense Secretary Pete Hegseth called it a supply chain risk.
After Anthropic challenged the Trump administration’s directive in court, the US judge threw out the Pentagon’s directive.
