As of mid August, Google's Gemini leads LMSys pretty comfortably. Although its score has dipped below 1300.

https://chat.lmsys.org/?leaderboard

Note two things.

LMSys has statistical ties. If multiple orgs tie for first... we will split the payouts. although this is quite unlikely

Secondly, note that the update shows as "Last updated: 2024-08-06." even though it's already August 13th. We will go by the update date. So we are looking at the first snapshot on or after 2024-12-01.

Google seems like a substantial favorite. But maybe not, if GPT-5 / Strawberry ships.