Anthropic has suspended public access to its Fable 5 and Mythos 5 AI models following a U.S. government export-control order.

The move highlights the growing tension between rapid AI deployment and national security oversight. As AI models gain more sophisticated capabilities, the U.S. government is increasingly using emergency directives to prevent potential vulnerabilities from being exploited by foreign adversaries.

Anthropic released the Fable 5 model in early June 2024 [1]. However, the company removed the tool and its related Mythos 5 model a few days after the release [2]. The suspension came after the White House invoked an emergency export-control order [3].

U.S. authorities said national security concerns were the primary reason for the directive [1]. Officials said they identified specific vulnerabilities within the model that could pose a risk if left accessible to the public or foreign entities [4]. This regulatory action forced the company to halt worldwide access to the tools [5].

The sudden removal of the models sparked frustration among users and the developer community [6]. Many users expressed anger over the brief window of availability before the government intervention took effect [6].

Anthropic has not provided a timeline for when, or if, the models will return to public availability. The company is currently working with government officials to address the security flaws identified in the export-control order [4].

“Anthropic has suspended public access to its Fable 5 and Mythos 5 AI models”

This incident establishes a precedent for the U.S. government to exercise rapid, retroactive control over AI releases. By using export-control laws to pull a product already in the public domain, the administration is signaling that national security interests outweigh the commercial release cycles of AI labs.