Claude Fable 5 vs Claude Sonnet 4.6 — Who Actually Wins? Real Benchmark Data (2026)

head to head

Claude Fable 5 vs Claude Sonnet 4.6

7 shared benchmarks

7

wins

0

ties

0

wins

88.0%

BrowseComp

74.0%

88.9%

CharXiv

72.4%

70.0%

DeepSWE

30.0%

92.6%

GPQA Diamond

89.9%

53.3%

Humanity's Last Exam

33.2%

84.7%

MCP-Atlas

69.5%

81.2%

MMMU Pro

74.5%