Gemini 3.1 Pro vs GPT-5.5
The comparison
On LM Arena, Gemini 3.1 Pro scores higher (1486 Elo vs 1482 Elo), from a larger review base (86,683 vs 47,572 Arena votes).
As of Jul 30, 2026, Gemini 3.1 Pro is rated 1486 Elo on LM Arena (86,683 Arena votes); GPT-5.5 is rated 1482 Elo on LM Arena (47,572 Arena votes). No source is blended; each stands on its own.
Gemini 3.1 Pro
1486 EloLM Arenahigher
86,683Arena voteslarger base
GPT-5.5
1482 EloLM Arena
47,572Arena votes