Claude Haiku 4.5 vs Claude Sonnet 4.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Haiku 4.5 vs Claude Sonnet 4.6

3 shared benchmarks

0

wins

0

ties

3

wins

80.7%

AIME

94.0%

50.7%

OSWorld

72.5%

73.3%

SWE-bench Verified

79.6%