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CYBER● ELEVATEDJun 23 · Jun 23, 2026, 11:03 AM

Anthropic’s Fable 5 Model Jailbroken Within Days

Schneier

Fable 5 is the supposed safe version of Anthropic’s Mythos Preview, with guardrails to ensure that it can’t be used to create cyberattacks. Well, that restriction was bypassed within days.

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