On June 30, 2026, Anthropic announced that the US export controls on its Claude Fable 5 and Mythos 5 models had been lifted, stating “as of today, June 30, the export controls on Fable 5 and Mythos 5 have been lifted.” The announcement ended an eighteen-day standoff that began with a June 12 government directive, citing national security authorities, that forced Anthropic to suspend all access to both models, including by its own foreign national employees.
Fable 5 returned globally starting July 1 across the Claude Platform, Claude.ai, Claude Code, and Claude Cowork, with paid plan subscribers receiving complimentary access through July 7 before normal usage credits apply. Mythos 5, which Anthropic describes as its strongest cybersecurity model, had already been partially restored: following US government approval on June 26, access was reopened for a set of US organizations that operate and defend critical infrastructure.
The episode marked the first cycle of commercial enforcement and release under the new US framework of pre-release government review of frontier models, established by the June 2, 2026 executive order on advanced AI innovation and security. Anthropic had publicly disputed the original suspension, arguing that a narrow potential jailbreak finding should not be cause for recalling a widely deployed commercial model.