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[ARTICLE · art-25986] src=the-decoder.com pub= topic=ai-safety verified=true sentiment=↓ negative

US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide

The US government ordered Anthropic to disable global access to its Claude Fable 5 and Mythos 5 models, citing jailbreak risks. Anthropic complied but argued the vulnerabilities are minor and also exist in competing models like GPT-5.5, warning the move could set a precedent halting frontier AI deployments.

read1 min publishedJun 13, 2026

The US government has ordered Anthropic to shut down global access to Fable 5 and Mythos 5, citing alleged jailbreak risks. Anthropic is complying but pushing back publicly: the vulnerabilities are minor and exist in competing models like GPT-5.5, the company says, an ironic turn after the company spent months hyping the cybersecurity risks of its own Mythos class. Anthropic warns the move could set a precedent that halts all frontier deployments.

The article US government forces Anthropic to disable Claude Fable 5 and Mythos 5 for all customers worldwide appeared first on The Decoder.

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