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macroJun 14, 2026, 2:20 PM

US Authorities Order Anthropic to Suspend Claude Fable 5 Over Security Concerns

Anthropic has suspended access to its Claude Fable 5 model shortly after launch, citing a US government directive to block foreign nationals from using it. The company described the model as 'too powerful' and abruptly disabled it along with Mythos 5 for all customers.

Anthropic has halted access to its newly released Claude Fable 5 AI model after US authorities raised security concerns. The company stated it was ordered to "suspend foreign nationals" from using the model, which it described as "too powerful."

In a compliance move, Anthropic said it must abruptly disable both Fable 5 and Mythos 5 for all customers. The action highlights growing government scrutiny over advanced AI capabilities and who should be permitted to use them.

The development comes just days after the model's launch, with Anthropic itself acknowledging the exceptional power of the technology. The situation underscores the accelerating pace of AI advancement and regulatory response.

Source: The Kobeissi Letter