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

head to head

Claude Mythos 5 vs Claude Sonnet 5

2 shared benchmarks

2

wins

0

ties

0

wins

80.3%

SWE-bench Pro

63.2%

88.0%

Terminal-Bench 2.1

80.4%