Unlocking Claude Mythos 5: access for 100 US organizations and anticipation of Fable 5
The U.S. Department of Commerce has officially lifted the export ban on Anthropic's Claude Mythos 5 model. This decision grants access to the advanced AI model for over one hundred organizations, including the largest corporations and government entities listed in Appendix A.
This step concludes a two-week standoff between the Trump administration and Anthropic. As I noted earlier, the block was imposed amid concerns over the model's safety, but restrictions have now been lifted — though only for verified partners. Commerce Secretary Howard Lutnick, in a letter to Anthropic's CTO Tom Brown, emphasized that current precautionary measures allow trusted partners to access Mythos 5 without additional licensing.
Previously, the Mythos model was used exclusively within the Glasswing program — a vulnerability research project involving approximately 150 organizations from over 15 countries. Recall that Mythos identified critical errors in classified systems within hours during government testing. Now, its capabilities will become available to a wide range of U.S. entities.
Fable 5 Still Awaits Its Turn
Unlike Mythos, the fate of Fable 5 remains uncertain. According to information from the negotiation process, the model's release has moved forward, but no specific timeline has been provided. Previously, Fable 5 was the most powerful publicly available AI tool accessible to all subscribers, but its broad access is now restricted.
Interestingly, a new regulatory system is being formed in parallel. On June 2, an executive order was signed, opening a voluntary channel for federal review of advanced AI models. Developers can submit their solutions for cybersecurity checks 30 days before launch. This is a clear signal that Washington is tightening control not only over chip exports but also over access to the models themselves.
OpenAI has followed the same path, restricting access to the most powerful version of GPT-5.6, named Sol, to approximately 20 government-approved partners, while leaving the weaker versions Terra and Luna for the general public. This confirms the trend: leading AI companies are forced to adapt to new rules of the game.
Notably, the initial blocks were linked to concerns that Chinese entities might gain access to the technology. South Korean operator SK Telecom came into focus, being added to the Glasswing list and then having its access restricted. SK Telecom denied any connection to China, but the suspicion remains.
My analysis: Lifting the block on Mythos 5 is a compromise that allows Anthropic to retain the loyalty of key clients, but Fable 5 will likely remain a hostage to geopolitical games. Europe and other regions are already feeling dependent on Washington's decisions, and this is just the beginning. In the coming days, we will learn whether Fable 5 receives similar clearance, but I suspect the process will drag on.