Claude Opus 4.6 vs GPT-5.2 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Opus 4.6 vs GPT-5.2

5 shared benchmarks

2

wins

1

ties

2

wins

100.0%

AIME

100.0%

91.3%

GPQA Diamond

92.4%

53.1%

Humanity's Last Exam

27.8%

93.0%

MRCR v2

98.0%

81.42%

SWE-bench Verified

80.0%