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

head to head

Claude Fable 5 vs Claude Mythos 5

4 shared benchmarks

0

wins

2

ties

2

wins

88.0%

BrowseComp

88.0%

92.6%

GPQA Diamond

94.1%

80.3%

SWE-bench Pro

80.3%

84.6%

Terminal-Bench 2.1

88.0%