Step-3.5-Flash vs Claude Sonnet 4.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Step-3.5-Flash vs Claude Sonnet 4.6

6 shared benchmarks

2

wins

0

ties

4

wins

97.3%

AIME

94.0%

69.0%

BrowseComp

74.0%

83.5%

GPQA Diamond

89.9%

84.4%

MMLU Pro

79.2%

74.4%

SWE-bench Verified

79.6%

51.0%

Terminal-Bench 2.0

59.1%