Anthropic has abruptly disabled Claude Fable 5 and Mythos 5 globally following a sudden U.S. government export control directive. The federal order mandates blocking access to all foreign nationals over national security concerns regarding an alleged narrow jailbreak. Because real-time nationality verification is technically impossible, Anthropic was forced to pull the models entirely for everyone. Anthropic is pushing back, clarifying that the flagged "jailbreak" was simply standard code-review and vulnerability-patching capabilities already common in rival models like OpenAI's GPT-5.5. They warn that this reactive regulatory overreach sets a dangerous precedent that could paralyze future frontier AI deployments across the entire tech industry.
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