US govt orders Anthropic to suspend Fable 5, Mythos 5

The US government issued an export control directive forcing Anthropic to suspend access to Fable 5 and Mythos 5 models, citing national security concerns about a potential jailbreak. Anthropic received the order at 5:21pm ET and complied, but disputes the severity of the vulnerability, noting that other models can find the same minor bugs. Access to other Anthropic models remains unaffected.