OpenAI's GPT-5.6 Sol on Cerebras is nearly 7x faster than Fable 5

haider1 · x · 2026-08-15

Cerebras benchmarked both models on all 2,500 questions of Humanity's Last Exam. Fable 5 took 78h 27m, while GPT-5.6 Sol (ultrafast) finished in just 11h 11m, demonstrating nearly 7x speed improvement.

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