Anthropic has disabled its most advanced artificial intelligence models, Fable 5 and Mythos 5, for all users [1].
The sudden shutdown highlights the growing tension between the rapid deployment of frontier AI and the U.S. government's efforts to restrict foreign access to critical technology. By removing these models entirely, the company effectively halts a global rollout to comply with federal mandates.
The decision follows a U.S. government export-control directive requiring the suspension of access for foreign nationals [1], [2]. Officials said national-security concerns were the primary driver for the order [1], [3]. While some reports attribute the directive to the Trump administration [4], other sources identify it as a general U.S. government action.
Public access to these specific models was disabled three days [5] after their initial release. The move affects all users, regardless of their location, to ensure compliance with the restrictive order.
Alternative reports suggest a different origin for the friction. One account states the relationship between Anthropic and the government deteriorated after the company refused to allow the U.S. military to use its models for autonomous weapons, and domestic surveillance [6]. However, the company has linked the current suspension to the export-control mandate.
Anthropic has not provided a timeline for when, or if, these models will return to public availability. The company said the action was necessary to meet the legal requirements of the export-control order [1], [3].
“Anthropic has disabled its most advanced artificial intelligence models, Fable 5 and Mythos 5, for all users.”
This event signals a shift toward more aggressive government intervention in the AI sector. By utilizing export-control orders to limit foreign access, the U.S. is treating high-tier AI models as strategic assets similar to advanced semiconductors. This creates a precarious environment for AI labs that rely on global user bases for testing and revenue but must navigate increasingly rigid national security boundaries.
