Anthropic's best model ever was pulled from the internet — here's what actually happened

On June 9, 2026, Anthropic released Fable 5 to much fanfare. It was the first publicly available version of its Mythos-class model, the most capable AI model the company had ever shipped to the general public, and within hours, it was sitting at the top of just about every major benchmark. It beat both ChatGPT and Gemini, was labeled state of the...

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