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GPT-5.5 Pro

Not yet ranked: too few independent results so far. Released 23 Apr 2026.

Blended price
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Output speed
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First answer
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Context
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How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.
  1. Reasoning68
  2. Maths68

Benchmark results

One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.

Reasoning

BenchmarkxhighSource
GPQA Diamond93.9%#10Epoch AI Benchmarking Hub

Maths

BenchmarkxhighSource
OTIS Mock AIME100.0%#1Epoch AI Benchmarking Hub

Where it wins

Benchmarks where this configuration ranks in the top five of every configuration measured.

See also

All OpenAI models

Data as of 9 Sept 2026. Compare with another model.