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Morning Edition · Sunday, July 19, 2026Published at 1:30 AM EDT · New York
Anthropic and Rivals Propose a Shared Scale for Rating AI Jailbreak Severity
The draft Cyber Jailbreak Severity scale runs CJS-0 to CJS-4 across four axes, published as Anthropic restored Fable 5 and Mythos 5 after a 19-day export-control block.
Anthropic published a first draft of a Cyber Jailbreak Severity scale developed with Amazon, Microsoft, Google, and other members of its Glasswing coalition. The framework rates a jailbreak from CJS-0 (informational) to CJS-4 (critical) on…
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