Claude Opus 4.6 vs GPT-5 mini — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Opus 4.6 vs GPT-5 mini

4 shared benchmarks

3

wins

0

ties

1

wins

100.0%

AIME

94.2%

91.3%

GPQA Diamond

85.0%

82.0%

MMLU Pro

83.3%

81.42%

SWE-bench Verified

60.4%