The Trump administration has partially lifted its two-week ban on Anthropic’s AI models, clearing Anthropic Mythos 5 for deployment to more than 100 US government agencies and private companies. The decision is the first rollback of restrictions that forced Anthropic to pull both Mythos 5 and Fable 5 from the market on June 12.
Commerce Secretary Howard Lutnick sent the authorization to Anthropic’s chief compute officer Tom Brown on Friday. In the letter, seen by Semafor, Lutnick wrote that “appropriate safeguards are in place to permit certain trusted partners to access the Claude Mythos 5 Model.” Both Semafor and Reuters reported on the directive.
Anthropic confirmed the development in a post on X: “Today, the government notified us that Mythos 5, our strongest cybersecurity model, can be redeployed to a set of US organizations that operate and defend critical infrastructure. We’re restoring access for these organizations quickly, and we’re continuing to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again.”
Who gets access to Anthropic Mythos 5
The approved list covers organizations operating and defending critical infrastructure across the United States, including both government agencies and private companies. The specific entities on the list have not been publicly named, but the directive signals the government has assessed their security posture as sufficient for Mythos 5 access.
The directive also extends to non-American employees at those approved organizations, including Anthropic’s own non-US staff. The original June 12 ban explicitly barred non-American workers from accessing the models. Since Anthropic employs researchers and engineers from around the world, this extension lifts a notable restriction on the company’s own operations as well.
What triggered the June 12 ban
The administration pulled Mythos 5 and Fable 5 after security researchers allegedly bypassed their built-in guardrails. Fable 5 had launched publicly just days before the ban, positioned as a more protected version with stronger safeguards. Those protections were reportedly circumvented just as quickly.
Both models are Anthropic’s cybersecurity-focused AI systems, designed for organizations working in sensitive security contexts. Their specialty in that area meant the US government was closely watching their protective properties before any broad deployment.
Fable 5 still offline
Friday’s directive covers Anthropic Mythos 5 only. The administration made no announcement about Fable 5, and no timeline has been offered for its return to general availability.
Anthropic said it is continuing talks with the US government to expand access further and bring Fable 5 back into general use. The company did not immediately respond to requests for comment on what conditions must be met before that happens.
For the 100-plus authorized organizations, Mythos 5 access resumes now. For Anthropic’s broader commercial customers, the ban on both models remains in place.