Claude Opus 4.6 vs Claude Mythos Preview — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Opus 4.6 vs Claude Mythos Preview

10 shared benchmarks

0

wins

0

ties

10

wins

84.0%

BrowseComp

86.9%

66.6%

CyberGym

83.1%

91.3%

GPQA Diamond

94.6%

53.1%

Humanity's Last Exam

56.8%

72.7%

OSWorld

79.6%

77.8%

SWE-bench Multilingual

87.3%

27.1%

SWE-bench Multimodal

59.0%

81.42%

SWE-bench Verified

93.9%

81.8%

Terminal-Bench 2.0

82.0%

42.3%

USAMO 2026

97.6%