Arena
Public platform for chatting with AI models, comparing them side by side and voting to shape a community leaderboard.
Arena is a web platform for comparing AI models. Arena lets users send a prompt, see responses from different models side by side, and vote for the better one; the votes build a public leaderboard for text, code, image and video models. It is used in the browser by typing into a chat box.
Best for Developers, researchers and anyone choosing between AI models who wants to test them on their own prompts and see community rankings.
- Platforms
- Web
- Made by
- Arena Intelligence Inc.
- Added
Last verified: . Information taken from arena.ai.
What is Arena?
Arena is a web platform for evaluating AI models through everyday use. Visitors type a prompt, receive answers from models, compare them next to each other and vote, and those votes feed a public leaderboard. The interface offers a Battle mode alongside a selector for picking a specific model, and suggests starting tasks such as building a landing page, a dashboard, a browser game or a full-stack app. Rankings are published per category, among them text, web development, vision, search, document tasks, text-to-image, image editing and several video categories, with an agent ranking as well. The project was started by UC Berkeley researchers and was earlier called Chatbot Arena and then LMArena; it has been run by Arena Intelligence Inc. since 2025. A notice on the page says inputs are processed by third-party AI.
Key Features
Side-by-Side Comparison
Shows responses from different models to the same prompt so you can judge them directly against each other.
Battle Mode
A mode in the prompt box, shown as Battle, for pitting models against each other and voting on the result.
Public Leaderboard
Publishes rankings built from community votes, covering language, image and code models.
Category Rankings
Separate boards exist for areas such as text, WebDev, vision, document, search, image editing and video generation.
Model Choice
Lets you select any listed model for a chat rather than leaving the pick to the automatic setting.
App and Site Building
Starter prompts cover web projects such as a storefront, a dashboard, a game or turning an uploaded design image into code.
Use Cases
- Choosing a Model
- Try the same prompt on several models before deciding which one to adopt for a project.
- Checking Rankings
- Look up which models currently lead in a category such as text-to-image or web development.
- Prototyping a Web Page
- Ask a model to produce a landing page or small app and compare the outputs.
- Contributing to Evaluation
- Vote on responses so that your judgement counts toward the public leaderboard.
- Testing Image and Video Models
- Compare generation and editing models for images and video using your own prompts.
Things to know
- Third-party processing
- The home page notes that what you type is handled by outside AI providers and that answers can be wrong.
- Formerly LMArena
- The service was previously known as Chatbot Arena and LMArena before taking the Arena name.
- Rankings come from votes
- Leaderboard positions are derived from community evaluation rather than from a fixed test set alone.
FAQs
What is Arena?
Arena is a platform where people chat with AI models, compare their answers and vote, producing a public leaderboard of model performance.
What is Arena used for?
Arena is used to compare AI models on real prompts and to consult rankings for text, code, image, video and other categories.
Was Arena previously called LMArena?
Yes. Arena was formerly LMArena and before that Chatbot Arena, according to its About page.
Who makes Arena?
Arena is operated by Arena Intelligence Inc., formed in 2025, and was created by researchers from UC Berkeley.
What kinds of models does Arena rank?
Arena ranks language models as well as image, video, vision, search, document and web-development models, plus agents.
Are Arena's responses reliable?
Arena warns that answers can be inaccurate and that what you type is handled by outside AI providers, so outputs should be checked.
Who it's for
- AI researchers
- Developers
- Model builders
- Product teams
- Curious AI users
Used in these workflows
- Building an AI-powered app: the tool stack, layer by layerStage 1: Choosing a model
- Building an AI-powered app: the tool stack, layer by layerStage 2: Prompting and prototyping
Each guide lists the stages of one job and the tools that help at each stage. All guides
Comments
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Alternatives to Arena
| Tool | Free plan | Starting price | API |
|---|---|---|---|
ChatGPTAI chat assistant that answers questions, writes, creates images, runs deep research and helps with code. |
Yes | — | — |
 DeepSeekAI research company offering a chat assistant, a desktop harness and a token-billed API for its language models. |
— | — | Yes |
 Duck.aiDuckDuckGo's free chat front end that anonymizes conversations with third-party AI models. |
Yes | — | — |
 Google GeminiGoogle's AI assistant for chat, research, and image, video and music generation, tied into Google apps. |
Yes | — | Yes |
 Mammouth AIOne subscription that gives chat access to many text, image and video AI models, with projects and an API. |
— | — | Yes |
Listed in the same categories as Arena. A starting price appears only where we checked it on the maker’s pricing page; a dash means not checked or not published. All Large Language Models & Prompts tools