[New AI Yuan导读] Within 72 hours of release, the most powerful Claude Fable 5 has been pulled globally by a government directive.
Even Anthropic's own foreign employees are prohibited from accessing it.
It's utterly sudden!
Just now, Anthropic officially announced—
Global disabling of all foreign national access to Claude Fable 5 and Mythos 5.
Whether inside the US or abroad, even Anthropic's foreign employees are completely barred.
The 3-day-old Claude Fable 5 vanished in an instant.

The entire internet is in shock.
Top AI figures express disbelief.


Why did Anthropic suddenly pull the world's strongest Claude?
At 5:21 PM on June 11, a letter from the US government arrived at Anthropic.
That night, Fable 5 and Mythos 5 went offline for all users.

This is the first time in AI history that a commercial foundation model deployed to hundreds of millions has been forcibly recalled by the US government.
The government invoked national security powers and issued an export control directive, requiring suspension of access to Fable 5 and Mythos 5 by all foreign nationals—
Both within and outside the US, including Anthropic's foreign employees.
The practical effect: we must immediately disable Fable 5 and Mythos 5 for all customers to ensure compliance.
Note the detail — the ban targets "foreign persons," but Anthropic responded with a complete stop for everyone.
Fortunately, other Claude models remain unaffected for now.

On June 9, Anthropic officially released Claude Fable 5.
From launch to recall: just 72 hours.
Even worse for Anthropic, the letter provided no specifics about the alleged national security concerns.
"The letter did not provide details about its national security concerns.
Our understanding is that the government believes it has identified a method to bypass or 'jailbreak' Fable 5."
According to Claude's official Twitter post, all new conversations will use the default model or Opus 4.8, while existing Fable 5 conversations will error out and terminate.
API requests to Fable 5 will also return errors.
Therefore, they remind developers: "Update your integrations and switch to other Claude models."

Finally, the blog post states they are working urgently to restore access as soon as possible.


Official Statement
Full Anthropic statement:

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References:
https://www.anthropic.com/news/fable-mythos-access
https://x.com/AnthropicAI/status/2065597531644743999?s=20
Editor: Tao Zi
Chasing ASI
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