Claude Opus 5 vs Gemini 3.1 Pro

On LM Arena, Claude Opus 5 has 1494 Elo and Gemini 3.1 Pro has 1486 Elo. Claude Opus 5 has the higher displayed score on this source. Each source stands on its own; these scores do not establish an overall winner.

Claude Opus 5: 1494 Elo on LM Arena (19,353 Arena votes) (snapshot Aug 12, 2026). Gemini 3.1 Pro: 1486 Elo on LM Arena (94,728 Arena votes) (snapshot Aug 12, 2026). The snapshots may have been collected on different dates.