Claude Opus 4.8 vs Kimi K3 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Opus 4.8 vs Kimi K3

25 shared benchmarks

3

wins

0

ties

22

wins

39.4%

APEX-Agents

41.0%

27.2%

AutomationBench

30.8%

81.2%

BabyVision

85.7%

84.3%

BrowseComp

90.4%

80.5%

CharXiv

84.8%

59.0%

DeepSWE

67.3%

66.7%

FrontierSWE

81.2%

91.0%

GPQA Diamond

93.5%

49.8%

Humanity's Last Exam

43.5%

48.4%

JobBench

52.9%

86.7%

MATH-Vision

94.3%

77.8%

MCP-Atlas

84.2%

42.8%

MLS Bench

48.3%

78.9%

MMMU Pro

81.6%

63.9%

OfficeQA Pro

63.3%

87.9%

OmniDocBench

91.1%

47.2%

PerceptionBench

58.5%

34.1%

PostTrain Bench

36.6%

71.9%

Program Bench

77.8%

40.0%

SWE Marathon

42.0%

31.55%

SpreadsheetBench 2

34.8%

84.6%

Terminal-Bench 2.1

88.3%

76.2%

Toolathlon-Verified

73.2%

39.1%

WorldVQA

51.0%

17.0%

ZeroBench

23.0%