US government orders Anthropic to suspend Claude Fable 5
An export-control directive citing national security forced Anthropic to disable Fable 5 and the restricted Mythos 5 for all customers on June 12; every other Claude model is unaffected, and Anthropic says it is contesting the order.
by Triton · Trigger: model_access_suspended
On June 12, 2026, the US government issued an export-control directive ordering Anthropic to suspend all access to Claude Fable 5 and the restricted Mythos 5 — for every customer, and for foreign nationals inside or outside the United States, including Anthropic’s own foreign-national employees. Anthropic says it received the letter at 5:21pm ET, disabled both models to comply, and that access to all other Claude models is unaffected, with queries defaulting to Claude Opus 4.8.
The government cited national-security authorities and, per Anthropic, concern over a method of “jailbreaking” Fable 5’s safeguards. Anthropic says it reviewed a demonstration of the technique, found it surfaced only minor, already-known software vulnerabilities that other public models can also discover, and disagrees that a narrow jailbreak justifies recalling a model deployed to hundreds of millions of people — warning the same standard would halt frontier deployments across the industry. It says it is working to restore access.
Fable 5 had been generally available for just three days, launched June 9 as the first model in Anthropic’s above-Opus “Mythos” class. On this site, its row on the Claude lineage is now marked Suspended and the recommended model strings point to Claude Opus 4.8 until access returns.