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

head to head

Claude Opus 4.6 vs Claude Sonnet 5

2 shared benchmarks

0

wins

0

ties

2

wins

61.5%

CharXiv

77.0%

53.4%

SWE-bench Pro

63.2%