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 Commerce Department raised national security concerns about exports to foreign nationals.
Anthropic released a statement on its portal saying it was ordered to suspend foreign nationals from using Claude Fable 5, a program the company itself 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 competing AI models such as OpenAI’s ChatGPT and Google’s Gemini.
However, Anthropic highlighted that US national security officials had not identified the specific concerns.
“Our understanding is that the government believes it has become aware of 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 parties have been involved in a legal battle over an order to restrict government agencies from using Anthropic’s powerful AI tools.
Anthropic is pursuing a lawsuit against the Pentagon after Defense Secretary Pete Hegseth labeled it a supply chain risk.”
After Anthropic challenged the Trump administration’s directive in court, the US judge threw out the Pentagon’s directive.
