EVERYTHING
According to Decrypt, the U.S. government has mandated a total suspension of access to Anthropic's high-end AI models, Claude Fable 5 and Claude Mythos 5. The directive applies to all foreign nationals, including the company's own staff, regardless of whether they are located inside or outside of the United States. Because of the sweeping scope of this order, Anthropic was forced to take the models offline for its entire global customer base to ensure full regulatory compliance.
National security and jailbreak concerns
The government's intervention follows reports that a method exists to "jailbreak" the publicly available Fable 5 model. While the specific details of the national security threat were not disclosed in the official letter, officials believe the vulnerability poses a significant risk. The Mythos 5 model, which features fewer guardrails and possesses specialized capabilities for identifying cybersecurity exploits, was originally restricted to select partners before this intervention.
Anthropic has publicly disputed the severity of these findings. The company stated that it reviewed a demonstration of the alleged jailbreak technique and concluded that the vulnerabilities are relatively simple. Furthermore, Anthropic argues that other commercially available models can perform similar tasks without any specific bypass techniques required. The company noted that:
Industry implications and safety debates
Despite complying with the order, Anthropic warned that this move establishes a dangerous precedent for the technology sector. The company expressed concern that if such standards are applied universally, it could effectively halt all new deployments of frontier AI models across the industry. While access to other Anthropic products remains unaffected, the company is currently working to restore access to the suspended models as quickly as possible.
The situation has sparked internal friction regarding corporate ethics and safety branding. David Sacks, co-chair of the President’s Council of Advisers on Science and Technology, suggested that Anthropic's refusal to immediately fix the reported jailbreak led to the government's reluctant export control action. Sacks claimed that "Anthropic prioritized the continued offering of the consumer model over safety," noting a contradiction between the company's public ethos and its actions in this instance. The administration remains hopeful that Anthropic will resolve the technical flaw so that Fable 5 can eventually return to public release.