Claude Mythos Preview vs Claude Opus 4.7 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Mythos Preview vs Claude Opus 4.7

9 shared benchmarks

9

wins

0

ties

0

wins

86.9%

BrowseComp

79.3%

83.1%

CyberGym

73.8%

94.6%

GPQA Diamond

94.2%

79.6%

OSWorld

78.0%

87.3%

SWE-bench Multilingual

85.7%

59.0%

SWE-bench Multimodal

35.0%

77.8%

SWE-bench Pro

64.3%

93.9%

SWE-bench Verified

87.6%

82.0%

Terminal-Bench 2.0

77.0%