Anthropic’s Mythos 5 AI model cleared by U.S. for wider use

Anthropic PBC won US approval to restore some access to its powerful Mythos 5 artificial intelligence model, after resolving Trump administration concerns about the technology’s potential threats to national security. “Anthropic has worked with the US government to address risks associated with the Covered Models,” Commerce Secretary Howard Lutnick wrote to the company’s chief compute officer in a letter seen by Bloomberg News. “These efforts have yielded significant progress,” he wrote, saying that the model could be released to “certain trusted partners.” The clearance eases a confrontation that erupted two weeks ago when the government abruptly barred Anthropic from giving foreign nationals access to Mythos 5 and a related model, Fable 5, over fears that security guardrails could be circumvented. The order prompted the company to disable all global access to the two advanced systems and touched off intensive talks toward a resolution. “In just two weeks, we have worked diligently to ensure America remains the global leader in AI while safeguarding our security,” said Commerce Department spokesman Benno Kass. The Commerce letter dated Friday doesn’t mention any change to its restrictions on use of the Fable 5 model. “We received notice from the US government that Mythos 5, our strongest cybersecurity model, can be redeployed to a small group of cyber defenders and infrastructure providers,” Anthropic said in a statement. “We are working to provision the approved set of providers and restore their access to Mythos 5 as quickly as possible. We are pleased to see this progress and continue to work with the government to expand access to Mythos 5 and make Fable 5 available for general use again.” It’s unclear what steps Anthropic had to take to satisfy the government’s concerns that it was possible to “jailbreak,” or bypass guardrails on, the advanced models. The company expects conversations to continue over the weekend with the government as it aims to bring back ac