Gemini 3.1 Pro vs GPT-5.5

On LM Arena, Gemini 3.1 Pro has 1486 Elo and GPT-5.5 has 1481 Elo. Gemini 3.1 Pro has the higher displayed score on this source. Each source stands on its own; these scores do not establish an overall winner.

Gemini 3.1 Pro: 1486 Elo on LM Arena (94,728 Arena votes) (snapshot Aug 12, 2026). GPT-5.5: 1481 Elo on LM Arena (55,130 Arena votes) (snapshot Aug 12, 2026). The snapshots may have been collected on different dates.