GPT-5.5 vs Kimi K3 — Who Actually Wins? Real Benchmark Data (2026)

head to head

GPT-5.5 vs Kimi K3

25 shared benchmarks

1

wins

1

ties

23

wins

38.5%

APEX-Agents

41.0%

22.7%

AutomationBench

30.8%

83.6%

BabyVision

85.7%

84.4%

BrowseComp

90.4%

84.1%

CharXiv

84.8%

67.0%

DeepSWE

67.3%

64.9%

FrontierSWE

81.2%

93.5%

GPQA Diamond

93.5%

41.4%

Humanity's Last Exam

43.5%

38.3%

JobBench

52.9%

92.2%

MATH-Vision

94.3%

82.8%

MCP-Atlas

84.2%

35.5%

MLS Bench

48.3%

81.2%

MMMU Pro

81.6%

60.9%

OfficeQA Pro

63.3%

89.4%

OmniDocBench

91.1%

55.8%

PerceptionBench

58.5%

28.4%

PostTrain Bench

36.6%

70.8%

Program Bench

77.8%

14.0%

SWE Marathon

42.0%

29.05%

SpreadsheetBench 2

34.8%

83.4%

Terminal-Bench 2.1

88.3%

73.5%

Toolathlon-Verified

73.2%

38.5%

WorldVQA

51.0%

22.0%

ZeroBench

23.0%