Anthropic Restores Claude Fable 5 After U.S. Lifts Jailbreak-Linked Export Controls

Anthropic has restored access to Claude Fable 5 following the U.S. Commerce Department’s lifting of export controls triggered by a jailbreak vulnerability discovered in the model. The controls, implemented in June, restricted access to Fable 5 and Mythos 5 due to a prompt that allowed the model to reveal software flaws and generate malicious code. Anthropic responded by developing a new safety filter and proposing a standardized approach to evaluating the severity of jailbreaks, alongside increased collaboration with the U.S. government to monitor and address potential threats.