GPT-5.5 — Real Scores Across 17 Benchmarks (2026)

OpenAI

GPT-5.5

17 benchmarks

τ2-bench

#2 of 9

98.0%

GPQA Diamond

#6 of 101

93.6%

ARC-AGI 2

#2 of 9

85.0%

GDPval

#1 of 2

84.9%

BrowseComp

#7 of 33

84.4%

MMMU Pro

#1 of 22

83.2%

Terminal-Bench 2.0

#1 of 28

82.7%

CyberGym

#2 of 6

81.8%

MMMU Pro

#1 of 22

81.2%

OSWorld

#3 of 31

78.7%

MRCR v2

#6 of 13

74.0%

SWE-bench Pro

#4 of 27

58.6%

Toolathlon

#1 of 2

55.6%

Humanity's Last Exam

#9 of 50

52.2%

FrontierMath

#2 of 7

51.7%

Humanity's Last Exam

#9 of 50

41.4%

FrontierMath Tier 4

#3 of 5

35.4%