Claude Sonnet 5 vs DeepSeek V4 Flash — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Sonnet 5 vs DeepSeek V4 Flash

2 shared benchmarks

2

wins

0

ties

0

wins

63.2%

SWE-bench Pro

52.6%

80.4%

Terminal-Bench 2.1

62.0%