Anthropic announced Friday that it has suspended access to two of its artificial intelligence systems, Fable 5 and Mythos 5, following a directive from the U.S. federal government citing national security concerns.

The San Francisco-based AI company said the government ordered the suspension and imposed limits on foreign nationals' access to the systems. The action affects users attempting to access these specific AI models from outside the United States.

According to Anthropic's public statement, the government expressed concerns about potential security vulnerabilities in the systems. The company indicated that federal officials believe they have identified methods for bypassing or "jailbreaking" the Fable 5 system, referring to techniques that could potentially circumvent built-in safety controls.

The suspension represents an unusual direct government intervention in the operations of a major AI company. Anthropic, known for its Claude AI assistant and focus on AI safety research, has been working to comply with the federal directive while addressing the identified security issues.

The company has not provided a timeline for when access to the affected systems might be restored. The action comes amid growing government scrutiny of AI systems and their potential national security implications, particularly regarding foreign access to advanced artificial intelligence capabilities.

Anthropic's other AI products and services continue to operate normally, with the restrictions applying specifically to the Fable 5 and Mythos 5 systems mentioned in the government order.