Anthropic Disables Claude Fable 5 and Mythos 5 After Trump Administration Order
Anthropic has disabled its advanced AI models, Claude Fable 5 and Claude Mythos 5, following an export control directive from the Trump administration. The order, issued on Friday evening, mandates the suspension of access for all foreign nationals, including Anthropic employees, citing national security authorities. The move is the latest development in an ongoing dispute between the U.S. government and Anthropic, which was previously designated a "supply-chain risk" earlier this year. Anthropic complied by removing both models for all customers, although the specific national security concerns were not detailed in the government's directive.
Anthropic has removed its recently launched artificial intelligence models, Claude Fable 5 and Claude Mythos 5, in response to an export control directive issued by the Trump administration. The order, received by Anthropic on Friday at 5:21pm ET, barred foreign use of the AI models.
The directive specifically required Anthropic "to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees." To ensure compliance with the government's mandate, Anthropic subsequently disabled both Fable 5 and Mythos 5 for all its customers.
This action is part of an ongoing disagreement between the Trump administration and Anthropic. Earlier in the year, the U.S. government had designated Anthropic as a "supply-chain risk" to national security. The dispute originated after Anthropic requested assurances that its AI technology would not be utilized for mass surveillance or specific weapons of war, following the signing of a $200 million contract with the government.
The Trump administration cited national security authorities as the reason for the order but did not provide specific details regarding these concerns in the letter. Anthropic believes the government is aware of a method to "jailbreak" Fable 5.
Anthropic reported reviewing a demonstration of this technique, which identified a small number of previously known, minor vulnerabilities. The company described these vulnerabilities as "relatively simple" and noted that other AI models, such as OpenAI’s GPT-5.5, can also discover them without requiring a bypass.
Claude Fable 5 and Mythos 5 are promoted as Anthropic's most powerful models. Fable 5, a version of the Mythos model with built-in safety guardrails, was rolled out to the public earlier this week. The Mythos model had previously been deemed too "dangerous" for public launch. Claude Mythos 5 was released only to trusted test partners prior to the administration's directive.
According to Mashable Tech, both models are now unavailable following the Trump administration's directive.
