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Arena

Website comparing AI chatbots based on votes

Arena (formerly LMArena and Chatbot Arena) is a public, web-based platform that evaluates large language models (LLMs). Users enter prompts for two anonymous models to respond to and vote on the model that gave the better response, after which the models' identities are revealed.2 It is headquartered in Los Angeles, United States.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Apr 24, 2023Founded1
  • HeadquartersLos Angeles, United States1
  • Websitearena.ai
  • Legal formLimited Liability Company3
  • LEI2549006MIH53DP9F7E113
  • StatusActive3
  • LEI statusIssued and current3
  • Registered addressC/O THE CORPORATION TRUST COMPANY, 19801 Wilmington, United States3
  • Registered withDivision of Corporations, Department of State, 26052133

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Arena (formerly LMArena and Chatbot Arena) is a public, web-based platform that evaluates large language models (LLMs). Users enter prompts for two anonymous models to respond to and vote on the model that gave the better response, after which the models' identities are revealed.2

Corporate structure

Arena is part of a group headed by Anschutz Entertainment Group. 9 entities, 3 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Anschutz Entertainment Group Los Angeles, California, United States
    • L.A. ARENA HOLDCO, LLC Los Angeles, California, United States
      • Arena Los Angeles, California, United States
    • Regal Cinemas Subsidiary · Wilmington, Delaware, United States
    • Walden Media Subsidiary · Los Angeles, California, United States
    • AEG PRESENTS LLC Subsidiary · Los Angeles, California, United States
      • AEG PRESENTS LTD Subsidiary · London, United Kingdom
    • Thames Clippers Subsidiary · London, United Kingdom
    • Barclays Arena Owned · Altona, Germany
    • Crypto.com Arena Owned · Los Angeles, United States
    • Dignity Health Sports Park Owned · Carson, United States
    • examiner.com Owned
    • Farmers Field Owned · Los Angeles, United States
    • Heritage Bank Center Owned · Cincinnati, United States
    • Shell Energy Stadium Owned · Houston, United States
    • Toyota Sports Center Owned · El Segundo, United States
    • Uber Arena Owned · Berlin, Germany

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Subsidiaries and ownership

Parent company (GLEIF)

Ultimate parent

Ownership links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); each one cites its LEI record.

Former names

  • LMArenasince Sep 20, 20241
  • Chatbot Arenasince Apr 24, 20231

Timeline

  1. Jan 28, 2026Renamed Name changed to Arena1
  2. Sep 20, 2024Renamed Name changed to LMArena1
  3. Apr 24, 2023Founded Founded1
  4. Apr 8, 1998Parent Directly consolidated by L.A. ARENA HOLDCO, LLC3

Sources

The numbers on this page point here. Each one links to the record it came from.

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