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.

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 https://the-decoder.com/us-government-forces-anthropic-to-disable-claude-fable-5-and-mythos-5-for-all-customers-worldwide/ appeared first on The Decoder https://the-decoder.com .