TECHNOLOGY

Washington classifies Anthropic Mythos AI as cyber weapon

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The U.S. Department of Commerce has designated Anthropic’s Mythos artificial intelligence model, also known as Fable 5, as a specialized cyber weapon, triggering stringent export controls that bar any access by foreign nationals worldwide. The move followed a report from Amazon to federal authorities that it had found a structural bypass around Mythos’s safeguards, designed to limit misuse of its powerful bug-hunting functions. In response, Anthropic shut down global access, including for U.S. users, citing the inability to filter by nationality. Senior Anthropic executives have traveled to Washington, D.C., to negotiate with federal officials over the restrictions and potential remediation steps.

Prepared by Jonathan Pierce and reviewed by editorial team.

Timeline of Events

Earlier this year Mythos model publicly deployed
Recently Amazon detects safeguard bypass vulnerability
Shortly afterward Amazon notifies federal authorities
Soon after Commerce Department initiates export review
Following review Mythos classified specialized cyber weapon
Immediately Anthropic shuts down global Mythos access
This week Anthropic executives travel to Washington
Ongoing talks seek adjustments to export controls

News Intelligence

The shutdown of Mythos AI affects its users worldwide, including in the U.S. If you've been using its bug-hunting functions, you're out of luck for now. Keep an eye on Anthropic's updates for when service might resume.