Anthropic has started restoring access to Claude Fable 5 and Mythos 5 after the U.S. Department of Commerce lifted export controls that temporarily suspended the model.
Before redeployment, the company introduced additional safeguards, including a new classifier designed to block the jailbreak technique that prompted the restrictions.
Anthropic says the updated protections prevent the targeted exploit with 99% effectiveness while maintaining normal user experience. The company also committed to closer collaboration with U.S. government agencies on pre-release testing, incident reporting, and evaluation standards as it resumes global availability of Fable 5 and Mythos 5.
