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

head to head

Claude Fable 5 vs Claude Sonnet 5

5 shared benchmarks

5

wins

0

ties

0

wins

88.9%

CharXiv

77.0%

70.0%

DeepSWE

54.0%

85.0%

OSWorld-Verified

81.2%

80.3%

SWE-bench Pro

63.2%

84.6%

Terminal-Bench 2.1

80.4%