Claude Fable 5 vs GPT-5.5
The comparison
On LM Arena, Claude Fable 5 scores higher (1506 Elo vs 1481 Elo), from a smaller review base (21,242 vs 55,130 Arena votes).
As of Aug 12, 2026, Claude Fable 5 is rated 1506 Elo on LM Arena (21,242 Arena votes); GPT-5.5 is rated 1481 Elo on LM Arena (55,130 Arena votes). No source is blended; each stands on its own.
Claude Fable 5
1506 EloLM Arenahigher
21,242Arena votes
GPT-5.5
1481 EloLM Arena
55,130Arena voteslarger base