Regulation & Ethics
US government orders suspension of Claude Fable 5 and Mythos 5
Three days after launch, the US government ordered Anthropic to suspend foreign nationals' access to the Fable 5 and Mythos 5 models, citing national security.
[{"h":"The order","p":"On Friday, June 12, 2026, Anthropic received an export-control directive from the US government ordering the suspension of all access to the Fable 5 and Mythos 5 models by any foreign national, inside or outside the US — including Anthropic's own foreign employees."},{"h":"The stated reason","p":"According to news reports, the government believed a method had been found to bypass (\"jailbreak\") Fable 5's safeguards, potentially turning the model into an unrestricted cyber tool."},{"h":"Anthropic's response","p":"Anthropic complied with the order but publicly disputed the stated reason, arguing the cited vulnerability is simple and already reproducible in other publicly available models, such as GPT-5.5."}]