OpenAI Employee Notes Model Leaps Distort Baselines

charliermarsh · x · 2026-07-10

An OpenAI employee shared their firsthand experience with model iterations: before joining, they were obsessed with version 5.5, but after trying the 5.6 Sol version, switching back to 5.5 felt like a massive performance drop. They believe that as AI capabilities rapidly improve, users' cognitive baseline for model performance will continuously rise, a cycle that will keep recurring.

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