'AI of AIs' Mythos Suspended Following U.S. Government Directive

The U.S. administration has issued a complete ban on foreign access to Anthropic's top-tier artificial intelligence (AI) models, including 'Mythos.'

Anthropic stated, "The U.S. government has issued export control guidelines, in accordance with national security directives, that completely suspend access to 'Fable 5' and 'Mythos 5' for all foreign nationals."

The directive prohibits not only access to Mythos from abroad but also access by foreign nationals currently residing within the United States.

This restriction even extends to Anthropic's own foreign employees.

To comply with the regulation, Anthropic announced that it has immediately suspended Fable 5 and Mythos 5 services for all customers.

Regarding the government's directive, Anthropic explained, "The letter did not specify details concerning national security concerns."

However, Anthropic speculated that the government likely believes users can bypass the safety guardrails of Fable 5—designed to prevent misuse such as malicious hacking or the creation of biochemical weapons—through a method known as 'jailbreaking.'

The company added, "We believe this is a misunderstanding," and stated that it is working to restore services as quickly as possible.

Anthropic further noted that the jailbreaking method identified by the government is widely used in other models, including OpenAI's GPT-5.5, and is employed daily by experts responsible for system security.

"While we believe the government should have the authority to block the deployment of unsafe AI through transparent, fair, and technically grounded legal processes, this measure does not align with those principles," the company pointed out.

Sources reported that the government had previously attempted to temporarily halt the release of Anthropic's models but, failing to do so, issued the export control notice. The access restrictions are expected to remain in place for several weeks until the U.S. government's security framework is strengthened.

Mythos has triggered concerns across the global security industry, dubbed the 'Mythos Shock,' as it is known for its detection capabilities, such as quickly identifying bugs that humans have failed to discover for decades.
※ Please note: This article was translated by AI and may contain errors.