Claude Fable 5 vs Claude Opus 5
The comparison
On LM Arena, Claude Fable 5 scores higher (1506 Elo vs 1494 Elo), from a larger review base (21,242 vs 19,353 Arena votes).
As of Aug 12, 2026, Claude Fable 5 is rated 1506 Elo on LM Arena (21,242 Arena votes); Claude Opus 5 is rated 1494 Elo on LM Arena (19,353 Arena votes). No source is blended; each stands on its own.
Claude Fable 5
1506 EloLM Arenahigher
21,242Arena voteslarger base
Claude Opus 5
1494 EloLM Arena
19,353Arena votes