Gemini 3.1 Pro vs GPT-5.5
The comparison
On LM Arena, Gemini 3.1 Pro scores higher (1486 Elo vs 1481 Elo), from a larger review base (60,640 vs 28,268 Arena votes).
As of Jun 24, 2026, Gemini 3.1 Pro is rated 1486 Elo on LM Arena (60,640 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.
Gemini 3.1 Pro
1486 EloLM Arenahigher
60,640Arena voteslarger base
GPT-5.5
1481 EloLM Arena
28,268Arena votes