The US government has issued a directive to suspend access to Fable 5 and Mythos 5 for all foreign nationals, including foreign employees of Anthropic. As a result, Anthropic is required to disable these services for all customers to ensure compliance with the directive.

Mythos, an AI model developed by Anthropic, has demonstrated exceptional ability in identifying security vulnerabilities in source code. Due to its effectiveness, Anthropic has opted to limit access to Mythos, providing it only to selected companies for initial testing and remediation of critical issues.