Trump Administration Clears Anthropic’s Mythos 5 for Use by Over 100 U.S. Companies and Agencies
Trump administration authorized Anthropic to redeploy Claude Mythos 5 for 100+ U.S. agencies and companies, including Anthropic’s non‑American employees, partially reversing a ban that started June 12, 2026. Commerce Sec. Howard Lutnick wrote to chief compute officer Tom Brown that safeguards are in place after researchers allegedly bypassed Mythos 5’s guardrails; the directive doesn’t address Fable 5.
The Trump administration has authorized Anthropic to restore access to its cybersecurity AI model, Mythos 5, for more than 100 U.S. government agencies and companies — including their non-American employees. The move, reported by Semafor and Reuters, marks a partial reversal of a ban that had been in place since June 12, 2026.
Commerce Secretary Howard Lutnick communicated the decision to Anthropic’s chief compute officer Tom Brown in a letter seen by Semafor. “I have determined that appropriate safeguards are in place to permit certain trusted partners to access the Claude Mythos 5 Model,” Lutnick wrote. The authorized list also includes Anthropic’s own non-American employees, who had been caught under the original ban.
The ban was put in place approximately two weeks ago after Anthropic pulled both Mythos 5 and a related model, Fable 5, from the market. Security researchers had allegedly bypassed the models’ safety guardrails, prompting the withdrawal. Fable 5 had been publicly released a few days before the ban, and was described as having stronger protections than Mythos 5. The administration’s latest directive does not address Fable 5.
Anthropic acknowledged the development in a post on X on Friday: “Since June 12, we’ve been working closely with the US government to restore access to Claude Mythos 5 and Fable 5. 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.”
The company added that it is “continuing to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again,” suggesting broader restoration of both models may still be under negotiation. Anthropic did not respond to a request for further comment.