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

head to head

Claude Mythos 5 vs Claude Opus 4.6

3 shared benchmarks

3

wins

0

ties

0

wins

88.0%

BrowseComp

84.0%

94.1%

GPQA Diamond

91.3%

80.3%

SWE-bench Pro

53.4%