Anthropic breaks through the blockade: Mythos 5 gets the "green light" for the top 100 US organizations
The US administration has officially lifted export restrictions on Anthropic's Claude Mythos 5 model. This decision, made on Friday, opens access to the advanced AI system for over a hundred leading American corporations and government agencies. In effect, this concludes a two-week standoff between the White House and the developer.
Commerce Secretary Howard Lutnick confirmed in a letter to Anthropic's CTO Tom Brown that transferring Mythos 5 to organizations on the "Appendix A" list no longer requires a special license. According to him, the current security measures are deemed sufficient for working with verified partners.
A long road to unblocking
As a reminder, both models — Mythos and Fable — were forcibly shut down after one of Anthropic's largest investors, Amazon, expressed serious concerns about their safety. The company's researchers warned that Fable 5 is potentially vulnerable to hacking for dangerous purposes. Until today, Mythos was used exclusively within the Glasswing program — a vulnerability research project involving about 150 organizations from 15 countries. Previously, this model identified critical errors in classified government systems within just a few hours.
Fable 5 remains in the shadows
Unlike Mythos, the fate of the public version of Fable 5 remains unclear. Based on my information, its release process has stalled, and no one is giving exact timelines. Previously, Fable 5 was considered the most powerful publicly available AI tool, but now access to it is closed to the general audience.
The situation is developing against the backdrop of a new regulatory system being formed. On June 2, an executive order was signed creating a voluntary federal review channel for advanced AI models. Developers can submit their solutions for cybersecurity checks 30 days before launch. Simultaneously, Washington is tightening the export of AI chips to China, and now similar requirements are being extended to access to the models themselves.
Notably, OpenAI has followed the same path: on Friday, the company restricted access to the most powerful version of GPT-5.6, named Sol, providing it only to about 20 state-approved partners. The weaker versions, Terra and Luna, became available to the general public.
The key trigger for the blocks, as it turned out, was the concern that the technologies could be obtained by Chinese entities. The focus was on South Korean operator SK Telecom, which was first added to the Glasswing list and then had its access restricted. The company itself denies any connection to China.
Many leaders of major cybersecurity companies urged authorities to abandon restrictive measures. An open letter organized by former Facebook security chief Alex Stamos was signed by executives from Nvidia, Adobe, Zoom, and other giants.
Countries in Europe and other regions are already noting that they have become heavily dependent on Washington's decisions regarding access to new developments. Whether Fable 5 will be next in line for unblocking is a question for the coming days.
My analysis: The decision on Mythos 5 is not just a technical unblocking, but a precedent for shaping a new architecture of global AI control. The US is effectively creating a two-tier system: elite access for "verified" partners and restricted access for everyone else. The cryptocurrency and DeFi market, which actively uses AI for vulnerability analysis, should closely monitor these processes — they will directly impact the availability of cybersecurity tools.