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🔬 AnalysisSchneier on Security·35d ago

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.

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Originally published by Schneier on Security

Source: https://www.schneier.com/blog/archives/2026/06/anthropics-fable-5-model-jailbroken-within-days.html

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