GPT-5.5 Pro — Real Scores Across 7 Benchmarks (2026)

OpenAI

GPT-5.5 Pro

7 benchmarks

GPQA Diamond

#2 of 101

94.4%

BrowseComp

#1 of 33

90.1%

SWE-bench Pro

#5 of 27

58.6%

Humanity's Last Exam

#5 of 50

57.2%

FrontierMath

#1 of 7

52.4%

Humanity's Last Exam

#5 of 50

43.1%

FrontierMath Tier 4

#1 of 5

39.6%