Claude Fable 5 and Mythos 5 Still Offline Due to US Export Ban

The advanced artificial intelligence models, Claude Fable 5 and Mythos 5, developed by Anthropic, continue to be unavailable to users worldwide, marking over a week since their suspension. The models were taken offline on June 12, 2026, in compliance with a stringent export control order from the US Department of Commerce. This directive specifically prohibits Anthropic from distributing Fable 5 and Mythos 5 to foreign nationals, both within and outside the United States. The government's action was reportedly triggered by concerns over a "jailbreak" vulnerability identified in the models, which could potentially bypass safety mechanisms. However, Anthropic has publicly challenged this assessment, asserting that the alleged jailbreak is narrow in scope and that similar vulnerabilities are present in other leading AI models, such as GPT-5.5, which have not faced comparable restrictions. This disagreement highlights a growing tension between AI developers and regulatory bodies regarding the responsible deployment and control of frontier AI technologies. The prolonged outage has created considerable challenges for the AI community and Anthropic's customer base. Users who had adopted Fable 5 shortly after its initial release, particularly between June 9 and June 14, have been cut off from the service. Compounding the issue, the refund processing deadline for usage credits passed on June 20, potentially leaving some subscribers without recourse for lost access. Furthermore, the free-trial window for paid subscribers (Pro, Max, Team, and Enterprise plans) is set to expire on June 22, meaning users will soon be paying full subscription prices for models that are currently inaccessible. Developers relying on Anthropic's API have been forced to adapt by routing their operations to other available models, such as Claude Opus 4.8 and Sonnet 4.6, which remain unaffected by the ban. The situation has sparked frustration among users and industry observers, with many cybersecurity leaders reportedly deeming the government's export ban an "overreach." As of June 21, there has been no official announcement from Anthropic regarding a confirmed timeline for the restoration of Fable 5 and Mythos 5, leaving the future availability of these powerful AI models uncertain.