Anthropic’s Fable Is Locked Down As US Takes AI Safety Into Its Hands

InnovationAIAnthropic’s Fable Is Locked Down As US Takes AI Safety Into Its HandsBySandy Carter,Contributor.Forbes contributors publish independent expert analyses and insights. Sandy Carter, COO at Unstoppable, Top 10 Microsoft MSN AI EntrepreneurFollow AuthorJun 13, 2026, 01:58am EDTFable 5 gets shut down (Photo Illustration by Matteo Della Torre/NurPhoto via Getty Images)NurPhoto via Getty ImagesFable 5 became collateral damage on Friday evening at 5:21 pm per CNBC when Anthropic received an unprecedented directive from the Commerce Department: limit access to its most powerful AI models to US nationals only. The order targeting Fable, the guardrailed version of Anthropic’s Mythos model, potentially reshapes how frontier AI development operates in America.The directive comes after the government claims to have discovered what Anthropic calls a “jailbreak,” a method users could exploit to bypass Fable’s safety guardrails. Anthropic has pushed back hard, arguing in a blog post Friday that the government’s response is disproportionate to the actual risk. However, Bloomberg reports that Anthropic is complying with a Trump administration directive suspending foreign nationals from accessing Fable 5 and Mythos.But the company’s resistance may be overshadowed by a larger question: what happens when a founder-led AI company’s own warnings about existential risk get taken literally by policymakers?Anthropic Advocated Its Way Into Regulation With FableThis is what happens when you advocate loudly for AI safety regulation. The government listens.Anthropic built its entire corporate narrative on the premise that models like Mythos pose such severe risks that they should never be released to the public. The company stated plainly in April that Mythos was “too dangerous” for broad release because “the fallout for economies, public safety, and national security could be severe.” Anthropic launched Fable 5 as a compromise, a heavily guardrailed alternative designed to capture so...