Anthropic says the US Department of Commerce has lifted the export controls that forced it to pull Claude Fable 5 and Mythos 5 offline worldwide.
In a post on X on June 30, the company said it had received notice of the reversal and would begin restoring access starting today, with a fuller update to follow.
The models have been unavailable since June 12, when the Commerce Department ordered Anthropic to suspend access for all foreign nationals worldwide, including its own non-citizen employees, citing national security concerns.
At the time, Anthropic said it was technically impossible to comply with the directive in real time without shutting the models down completely. As a result, it removed Fable 5 and Mythos 5 from Claude, its API, Claude Code, and partner cloud platforms just days after their public launch.
The disruption caused reported timeouts and empty responses, but the exact cause was not immediately clear.
READ: Claude Users Face Service Disruptions as Anthropic Suspends Fable 5
The government was concerned that Fable 5 could be jailbroken to help carry out cyberattacks. Anthropic disagreed, saying the vulnerabilities were minor, already known, and not unique to Fable 5.
It further argued that other publicly available AI models could be exploited in similar ways without using the same jailbreak technique.
Despite the disagreement, the suspension went ahead. Anthropic then spent nearly three weeks negotiating with the administration while competitors, including Chinese open-source AI labs, continued releasing new models.
READ: Claude Mythos Finds 271 Security Vulnerabilities in Firefox Browser
Commerce Secretary Howard Lutnick said the Department worked with Anthropic to address the security concerns. As a result, it removed the requirement for validated licenses to export, re-export, or transfer the software.
Anthropic said it has since added a new safeguard designed to block the jailbreak method that led to the original order. According to the company, the safeguard prevents the technique from working about 99% of the time.
Mythos 5 is still available only to a limited group of approved US organizations, although Anthropic says it plans to expand access over time.
