Claude Opus 4.8 vs Kimi K2.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Opus 4.8 vs Kimi K2.6

9 shared benchmarks

7

wins

0

ties

2

wins

95.7%

AIME

96.4%

84.3%

BrowseComp

83.2%

80.5%

CharXiv

80.4%

91.0%

GPQA Diamond

90.5%

49.8%

Humanity's Last Exam

34.7%

78.9%

MMMU Pro

79.4%

54.8%

OSWorld 2.0

22.1%

69.2%

SWE-bench Pro

58.6%

84.6%

Terminal-Bench 2.1

71.3%