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

Anthropic restored Claude Fable 5 on July 1 after the U.S. Commerce Department lifted export controls imposed on June 12 due to a jailbreak reported by Amazon researchers. The company trained a new classifier that blocks the jailbreak technique with over 99% effectiveness, while the more restricted Mythos 5 was reinstated on June 26 for select U.S. organizations.