The US has lifted export curbs on Anthropic’s newest Claude models, Fable 5 and Mythos 5, about three weeks after the Trump administration flagged the models as national security risks. As of today, Anthropic confirmed in a blog post that Fable 5 will be available globally, and US organizations have had access restored to Mythos 5 since June 26. Anthropic said it is now working with the government to expand Mythos access to a 'broader set of domestic and international partners in the Glasswing program.' That program allows cybersecurity researchers at trusted companies to access Mythos for defensive purposes. Source: arstechnica

In a letter to Anthropic viewed by Reuters and The New York Times, Commerce Secretary Howard Lutnick said Anthropic would 'no longer need a license for exports or in-country transfers of its Claude Mythos and Claude Fable AI models.' The letter acknowledged that Anthropic had 'taken steps in close coordination with the US government to address the risks' posed by the models. Facing a longer delay in its models’ releases, Lutnick said that Anthropic agreed to expand its partnership with the government. The company said it also set up a program to work with hackers to red-team its models, and there’s now a dedicated internal team to monitor reports of emerging jailbreak threats 24/7. Source: arstechnica

On June 12, the Commerce Department ordered Anthropic to shut off access to its most advanced models for anyone outside the US. The order emerged from fears that China, Russia, or other countries of concern may exploit the models to attack US infrastructure, like the electric grid or the banking system. In response, Anthropic shut down all access, as it didn’t have a way to block users by country. In particular, Mythos was viewed as 'uniquely attractive to malicious actors who wish to misuse it in cyberattacks,' Anthropic’s blog said. According to Anth, the model 'can be used to find and exploit software vulnerabilities more effectively than any other model—and all but the most skilled human security experts,' and those 'prodigious cybersecurity capabilities' could be used against the US. Source: arstechnica