Lenny's Newsletter · Claire Vo

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GPT-5.6 Sol vs. Claude Fable: Why OpenAI’s new model crushes my benchmark

9 July 2026Product

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Watch now | 🎙️GPT 5.6-Sol beats Fable on prototypes, PRDs, and browser use in my 5-category How I AI benchmark, and here's exactly where each model earns its spot.

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