After a two-week ban, the US government is letting Anthropic ship its most powerful AI model globally again.
Fable 5 is back worldwide starting today through the Claude Platform, Claude.ai, Claude Code, and Claude Cowork. Pro, Max, Team, and select Enterprise plans include the model through July 7 at up to 50 percent of weekly usage limits. After that, it'll be billed through usage credits. Access on AWS, Google Cloud, and Microsoft Foundry will be restored "as quickly as possible."
Mythos 5, the less restricted version of the same base model, remains limited to a group of US organizations that got government approval on June 26. Anthropic says it's still working with the government to expand access to more partners in the so-called Glasswing program. Whether the EU will join remains unclear.
Anthropic confirms that the ban stemmed from a security finding by Amazon researchers. They had found a way to bypass Fable 5's safety guardrails. The model then identified several software vulnerabilities and, in one case, produced code showing how to exploit one of them.
Anthropic says it's "probably impossible" to make an AI model that can't be jailbroken
