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    A Claude Model Vanished for 18 Days: The Fable 5 Blackout, Explained

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    AI Industry Analysis
    Mixpeek Team
    July 1, 2026

    Summary

    Anthropic pulled its flagship Fable 5 model offline on June 12 with no warning and restored it 18 days later. The chain: Amazon researchers jailbroke the model into a vulnerability-finding tool, US export controls triggered, and because Anthropic could not verify who was calling the API, the model went dark for everyone. A timeline of the first regulatory blackout of a frontier model. Source: anthropic.com/news/redeploying-fable-5

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    About this video

    Anthropic pulled its flagship Fable 5 model offline on June 12 with no warning and restored it 18 days later. The chain: Amazon researchers jailbroke the model into a vulnerability-finding tool, US export controls triggered, and because Anthropic could not verify who was calling the API, the model went dark for everyone. A timeline of the first regulatory blackout of a frontier model. Source: anthropic.com/news/redeploying-fable-5

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