Arena (formerly LMArena) vs ChatGPT comparison

Arena (formerly LMArena) and ChatGPT compared side by side in AI.

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Arena (formerly LMArena)

A crowdsourced evaluation leaderboard where users compare two AI answers blind and vote to rank models

What is good

  • Cited like an industry standard based on millions of human votes
  • Compare and try the latest models for free
  • 5 million+ monthly users (reported 2026-01)

What could be better

  • Controversy over voter preference bias (tone, length)
  • Neutrality questioned because major labs are also customers

Arena (formerly LMArena) official site

ChatGPT

The most widely used general-purpose AI chatbot. Chat, writing, coding, image generation and web search in one place

What is good

  • No. 1 in users, so plenty of guides and tips
  • Widest range of features
  • Polished app and voice chat

What could be better

  • Tight usage limits on the free plan
  • Top features need the expensive Pro plans

ChatGPT official site

At a glance

Highlighted rows are where they differ.

ItemArena (formerly LMArena)Visit siteChatGPTVisit site
Starting priceFreeNot applicable≈₩10,623+ ($8)Official USD price
Free tierFreeFree plan available
Korean supportAverageGood
Main modelsLeaderboards: text, vision, documents, search, WebDev, image/image editing, video generation/editing, agents (Agent Arena), Alignment Index. Many major commercial and open models (total number of models needs checking)
  • GPT-6 (Sol)
  • GPT-6 Luna
  • GPT-6 Pro (Astra)
  • GPT-6.1 Sol
  • Image: ChatGPT Images 2.5
Pricing typeFree, Quote/Enterprise Contract-
TypeAI appsAI services
CategoryAI Directory/ComparisonChatbot/Assistant, Image Generation, Coding
CompanyArena (formerly LMArena), United StatesOpenAI, United States
Plans
  • Users: free (voting, chat). Revenue: paid evaluation services for AI labs and companies (launched 2025-09, reported to pass $30,000,000 in annualized spending in 2025-12). Price not disclosed
  • Free
  • Go $8
  • Plus $20
  • Pro $100/$200/$500
  • Business $25 (annual $20)
  • Enterprise/Edu
Pros
  • Cited like an industry standard based on millions of human votes
  • Compare and try the latest models for free
  • 5 million+ monthly users (reported 2026-01)
  • No. 1 in users, so plenty of guides and tips
  • Widest range of features
  • Polished app and voice chat
Cons
  • Controversy over voter preference bias (tone, length)
  • Neutrality questioned because major labs are also customers
  • Not a comparison of apps or services
  • Tight usage limits on the free plan
  • Top features need the expensive Pro plans

Prices and benefits may change. Check the official site before you pay.

Prices converted at 1 USD = ₩1,327.84 (2026-10-20). Original price shown in brackets. Taxes as listed by each provider.

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