EventPolicyJune 13, 2026
US government orders suspension of Anthropic's Fable 5 and Mythos 5

The US government issued an export control directive requiring Anthropic to immediately disable Fable 5 and Mythos 5 for all customers, citing a national security concern over a jailbreak method. Anthropic stated the vulnerabilities are minor and also discoverable by other models without any bypass.
15 sources
Statement on the US government directive to suspend access to Fable 5 and Mythos 5anthropic.com
Claude Fable 5 will be available again globally tomorrow. After a series of productive...x.com
Quoting Anthropicsimonwillison.net
Anthropic Restores Claude Fable 5 After U.S. Lifts Jailbreak-Linked Export Controlsthehackernews.com
Anthropic's Mythos 5 Gets US Approval for Wider Usebloomberg.com
Anthropic’s ‘Dangerous’ Fable Is Back! How Does It Do?artificiallawyer.com
Trump admin allows Anthropic to release Mythos AI model to some companies, government agencies: Reportscnbc.com