US government forces Anthropic to pull Fable 5 and Mythos 5 models over guardrail bypass

According to TechCrunch, the US government forced Anthropic to withdraw its two newest models, Fable 5 and Mythos 5, citing national security concerns after Amazon researchers allegedly discovered a method to bypass Fable 5's safety guardrails. Cybersecurity researchers signed an open letter opposing the move, and Anthropic stated similar jailbreaks exist in other models.

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