GPT-5.4 vs Claude Sonnet 4.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

GPT-5.4 vs Claude Sonnet 4.6

5 shared benchmarks

4

wins

0

ties

1

wins

82.7%

BrowseComp

74.0%

92.8%

GPQA Diamond

89.9%

75.0%

OSWorld

72.5%

77.2%

SWE-bench Verified

79.6%

81.8%

Terminal-Bench 2.0

59.1%