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Anthropic’s Fable 5 Model Jailbroken Within Days

Anthropic’s Fable 5 Model Jailbroken Within Days

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.

Tags: AI , cyberattack

Posted on June 23, 2026 at 7:03 AM11 Comments