Anthropic has suspended access to its two newest AI models, Claude Fable 5 and Claude Mythos 5, for all customers. The company said the move follows a government order related to national security concerns.
According to Anthropic's official announcement, the suspension took effect on June 12, 2026. The company apologized for the disruption and said it is working to restore access as soon as possible.
What Were Fable 5 and Mythos 5?
Anthropic had launched Claude Fable 5 just days before the suspension. The company described it as a "Mythos-class" model that had been made safe for general use. According to Anthropic, Fable 5's capabilities exceeded those of any model the company had ever made generally available. It was state-of-the-art on nearly all tested benchmarks of AI capability, showing exceptional performance in software engineering, knowledge work, vision, scientific research, and many other areas.
The company noted that the longer and more complex the task, the larger Fable 5's lead over other models.
Government Order and National Security Concerns
Anthropic did not provide details about the specific government order or the exact national security concerns that led to the suspension. The company's statement was brief, focusing on the disruption to customers and the effort to restore access.
The suspension affects all customers, meaning no one can currently use either Claude Fable 5 or Claude Mythos 5 through Anthropic's platforms.
Our Take: Transparency Needed in AI Regulation
This situation raises important questions about how governments and AI companies handle national security concerns. While we understand the need for caution with powerful AI models, the lack of detail about the government order is concerning. Customers who built workflows or products around these models are now left without access and without a clear timeline for restoration.
In our view, Anthropic should provide more transparency about what happened and what steps customers can take. The company's apology is welcome, but affected users need concrete information about when they can expect access to return. This incident also highlights the growing tension between rapid AI advancement and government oversight — a balance that will only become more important as models become more capable.
