The AI Daily Brief: Artificial Intelligence News and Analysis
The AI Daily Brief: Artificial Intelligence News and Analysis

Fable 5 Shut Down by US Government

June 13, 2026

AI Summary

5 min read

US Government Orders Anthropic to Shut Down Fable 5 and Mythos 5

In an unprecedented Friday evening move, the US government invoked national security authorities to order Anthropic to immediately suspend access to its frontier AI models Fable 5 and Mythos 5 for all foreign nationals worldwide—including Anthropic's own non-US employees. The directive, issued by Commerce Secretary Howard Lutnick via letter to CEO Dario Amodei, effectively bans usage by customers outside the United States and foreign nationals within the country. Anthropic complied with the legal order but publicly disputed its basis, calling it a "misunderstanding" and working to restore access.

The Government's Rationale and Anthropic's Response

The government's stated concern centered on a jailbreak technique reportedly discovered by researchers at Amazon, who used a series of prompts to extract information about security vulnerabilities from Anthropic's models. The Commerce Department's letter did not provide specific details of the alleged national security threat.

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What you'll learn

  • 1 (00:00) **Emergency Episode: U.S. Government Shuts Down Anthropic's Fable 5** - Host introduces breaking news that the U.S. government has issued an export control directive suspending access to Fable V and Mythos V for all foreign nationals, including Anthropic's own non-U.S. employees.
  • 2 (02:06) **Anthropic's Defense: "We Disagree with the Government's Logic"** - Anthropic argues the government's national security concern is based on a jailbreak technique that only reveals "previously known minor vulnerabilities."
  • 3 (04:47) **The Amazon Connection: Who Found the Jailbreak?** - The Wall Street Journal reports that the jailbreak research was done by researchers at Amazon.
  • 4 (05:40) **Timeline Speculation: "Anthropic Told the Government to Pound Sand"** - Prince on X pieces together a timeline suggesting the government asked Anthropic to pause releasing the models but was unsuccessful.
  • 5 (06:10) **The Immediate Fallout: Even Anthropic's Own Staff Can't Access Fable 5** - Rish Sharma notes that a huge number of Anthropic's technical staff, including Andrej Karpathy, are not U.S. nationals, meaning they are now barred from interacting with their own models.
  • 6 (06:24) **Industry Reaction: "It's Both"** - Dan Robitski on X captures the sentiment: "Am I mad at Anthropic or the US government? Both. Probably both."
  • 7 (07:40) **Export Control Incoherence: Critiques of U.S. Strategy** - Chris McGuire argues the administration is not enforcing existing export controls on AI chips while imposing broad model restrictions without warning.

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Guests on this episode

Show Notes

In this emergency episode, NLW breaks down the stunning news that the US government has ordered Anthropic to suspend access to Fable 5 and Mythos 5 for foreign nationals, forcing the company to shut the models down for all users. He explores Anthropic’s response, the backlash from across the AI world, and why this moment could set a major new precedent for government control over frontier AI.

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