The AI race is heating up: Anthropic's Mythos 5 model gets the "green light" for the top 100 US organizations, while Fable 5 awaits its turn.
A significant shift in U.S. artificial intelligence regulation occurred on Friday: the Department of Commerce officially lifted export restrictions on Anthropic's latest model — Claude Mythos 5. This decision opens access to the cutting-edge AI system for over 100 of the largest American companies and government agencies, including those on the so-called "List A" of trusted partners.
The easing of tensions between the Trump administration and Anthropic came after a two-week standoff. Commerce Secretary Howard Lutnick confirmed in a letter to the company's Chief Technology Officer Tom Brown that a separate license is no longer required to transfer Mythos 5 to organizations on the approved list. "Current precautionary measures allow certain verified partners to access the model," he emphasized.
Recall that both models — Mythos and Fable — were previously disabled after Anthropic's key investor, Amazon, expressed serious concerns about their safety. Company researchers warned that Fable 5 could be hacked for potentially dangerous purposes. Until this point, Mythos was used exclusively within the Glasswing project — a vulnerability search program involving about 150 organizations from 15 countries. Within hours of testing, the model had already identified critical errors in classified government systems.
Fable 5: Awaiting New Rules of the Game
Unlike Mythos, the fate of Fable 5 remains uncertain. Previously, this model was available to all subscribers and was considered the most powerful public AI tool. Now, its launch has been postponed indefinitely. A new architecture of restrictions is taking shape in the market: an executive order signed on June 2 created a voluntary federal review channel for advanced models. Developers can submit their solutions for a 30-day cybersecurity check before launch.
Notably, OpenAI followed the same path, restricting access to the most powerful version of GPT-5.6, named Sol, to about 20 government partners, while the weaker versions Terra and Luna became publicly available.
The initial reason for the blocks was concern that the technology could fall into China's hands. Particular attention was drawn to South Korean operator SK Telecom, which was first added to the Glasswing program and then had its access restricted. The company categorically denies any connection to China. Leaders of major cybersecurity companies, including former Facebook security chief Alex Stamos, as well as representatives from Nvidia, Adobe, and Zoom, urged authorities to abandon overly restrictive measures.
Europe and other regions have already felt the harsh dependence on Washington's decisions regarding access to the latest developments. Whether Fable 5 will become the next "approved" product, we will find out in the coming days.
Expert opinion: Lifting restrictions on Mythos 5 is not just a victory for Anthropic, but a signal of the formation of a new world order in AI, where access to advanced models will be strictly controlled by the state, not the market. Fable 5 will likely become a bargaining chip in a larger geopolitical game.