Claude Fable 5 vs GPT-5.5
The comparison
On LM Arena, Claude Fable 5 scores higher (1508 Elo vs 1481 Elo), from a smaller review base (4,297 vs 28,268 Arena votes).
As of Jun 24, 2026, Claude Fable 5 is rated 1508 Elo on LM Arena (4,297 Arena votes); GPT-5.5 is rated 1481 Elo on LM Arena (28,268 Arena votes). No source is blended; each stands on its own.
Claude Fable 5
1508 EloLM Arenahigher
4,297Arena votes
GPT-5.5
1481 EloLM Arena
28,268Arena voteslarger base