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      <title>Claude Fable 5.1 vs Opus 5, Fable 5 and GPT-5.6 Sol</title>
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      <description>Claude Fable 5.1 shipped today. Compared against Opus 5, Fable 5 and GPT-5.6 Sol: the 75% cache-read price cut, three breaking changes, and where the vendor table and third-party measurements disagree.</description>
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      <title>Claude Opus 5 vs GPT-5.6 Sol, Fable 5 and Sonnet 5</title>
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      <description>Claude Opus 5 compared with GPT-5.6 Sol, Fable 5 and Sonnet 5 across coding, agentic work, long context and cost, plus what changed from Opus 4.8 and what to watch when migrating.</description>
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