
Claude Fable 5 returned to global users on July 1 after a 20-day export-control suspension triggered by an Amazon jailbreak report. Anthropic added a targeted safety classifier that blocks the specific technique in over 99 percent of cases, at the cost of more false-positive blocks on legitimate cybersecurity coding work. The real news is underneath: a proposed four-criterion framework, co-developed with Amazon, Microsoft, Google, and Glasswing, for how the industry classifies jailbreak severity.



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