LMArena vs OpenRouter Chat (2026): which should you pick?
As of Nov 13, 2026, LMArena grades higher than OpenRouter Chat: 2.2 against 2.0 out of 4.0.
Checked Nov 12, 2026 and Nov 13, 2026 · graded Nov 12, 2026 and Nov 13, 2026 by ToolGPA
LMArena grades higher on ease of use. They get the same grade on value for money, the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
OpenRouter Chat
Compare answers from hundreds of AI models in one chat
Free plan · from $0
Which one is for you
Pick LMArena if
- Fits if you are choosing a model and want to see answers from several at once
- Works for people who follow community-voted AI rankings
Look elsewhere if
- Skip it if you want a daily assistant with memory and files, as it is built for comparison
- Not for you if you mind your votes being public, as they feed the leaderboards
- Watch out: the cost and any limits could not be confirmed from the pages read
- Watch out: in Battle mode models stay anonymous until you vote, and an account may be needed for some features
Pick OpenRouter Chat if
- Fits if you want to see how several models answer the same prompt
- Works for developers who want one API in front of many providers
Look elsewhere if
- Skip it if you want an assistant with memory and file tools, as the chat page has neither
- Tight if you stay free, with 50 requests a day on free models only
- Watch out: a 5.5% fee on credit purchases on Standard, and 8% on Business
- Watch out: a negative credit balance blocks the free models until you add credits
How we grade them
| 2.2GPALMArenaFair | 2.0GPAOpenRouter ChatFair | |
|---|---|---|
| Value for money | CThe listing calls it free, but no price page exists and the homepage sits behind a bot check, so the cost is not confirmed. That leaves it in the middle. | CThere is no subscription: you buy credits at each provider's list price plus a 5.5% fee on Standard. That does not map onto the $12 monthly category middle, so it sits mid-pack. |
| Free plan and trial | CListed as free, but the terms say an account may be required for some features, and no usage limits are published. | C25+ free models for chat and API, limited to 50 requests a day and 20 a minute. A negative credit balance blocks them until you add credits. |
| Features | CBattle, Side by Side and Direct modes, leaderboards, image and video generation. A focused tool for comparing models, not a daily assistant. | CSide-by-side comparison, routing and fallback, spend controls and one API across 600+ models. The chat page has no memory or file tools, so it is a playground, not a full assistant. |
| Ease of use | BA website where you type a prompt and pick the better answer. No store rating is on record. | CNo store rating on record. You pick models, buy credits and manage keys, which is a small learning curve for a chat window. |
| Platforms and integrations | CWeb only. The pages name no apps and no integrations. | CWeb only, with an API that works through the OpenAI SDK. No desktop or phone app is listed. |
| Best for | comparing AI models side by side and voting | comparing many AI models side by side |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: LMArena and OpenRouter Chat. How we grade
Where they differ
- LMArena also covers AI search, image generation and video generation.
In commonFree planWebChat assistant
At a glance
| LMArena | OpenRouter Chat | |
|---|---|---|
| Pricing | Free | Free plan |
| Starts at | Free | $0, plus a 5.5% fee when you buy credits on Standard |
| Free plan | None | Chat and API access to 25+ free models from 4 providers, limited to 50 requests a day. |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Arena Intelligence Inc. | OpenRouter, Inc. |
| Price read from | Not confirmed | openrouter.ai |
| Checked | Nov 13, 2026 | Nov 12, 2026 |
Worth knowing
LMArena
- The pricing could not be confirmed: the homepage sits behind a bot check and no pricing page exists, so cost and any usage limits are not verified here.
- In Battle mode the models are anonymous until you vote, and your votes become part of the public leaderboards.
- The terms say an account may be required to access certain features of the service.
- The vendor's pages describe a web product and name no desktop or mobile apps.
OpenRouter Chat
- Inference is billed at each provider's list price; OpenRouter's 5.5% (Standard) or 8% (Business) fee applies when credits are bought.
- Free models are capped at 20 requests a minute and 50 a day, rising to 1,000 a day after $10 of credits are bought.
- A negative credit balance blocks free models until you add credits.
- The chat page is not a full assistant with memory or file tools; it is a comparison playground.
Key features
LMArena
- Battle mode
- Two anonymous models answer the same prompt and you vote for the better reply. Pre-release models can show up under codenames, according to the FAQ.
- Side by Side and Direct modes
- Side by Side lets you pick two models to compare, and Direct Mode lets you chat with one model of your choice. The FAQ describes how votes are used in each.
- Public leaderboards
- Rankings come from votes using the Bradley-Terry rating system and cover categories such as text, WebDev, vision, document, search, image and video.
- Image and video generation
- The site lists use cases for generating images and videos, with matching text-to-image, image edit and video leaderboards, and a help article on Video Arena.
- Agent and web app building
- The navigation lists an Agent leaderboard and use cases for building apps and websites and completing multi-step tasks.
OpenRouter Chat
- Side-by-side comparison
- Pick several models, send one message to each and read the answers next to each other in the chat playground.
- 600+ models
- The paid plans reach 600+ models from OpenAI, Google, Anthropic and other providers; the Free plan covers 25+ free models.
- One API
- The API is OpenAI-compatible, so changing the base URL and model names is the migration step OpenRouter describes.
- Routing and fallback
- Routing can try alternative models when one errors, and errored attempts are not charged for model tokens.
- Spend controls
- Standard and above add budgets and spend controls, plus prompt caching and a management API key.
Plans
LMArena
Pricing could not be confirmed. See arena.ai.
OpenRouter Chat
Free$0
25+ free models, chat and API access, activity logs, 5 workspaces and 50 requests a day with community support.
Standard$0
pay as you go, with a 5.5% fee on credit purchases
600+ models across 80+ providers, auto-routing, budgets and spend controls. You buy credits; each request draws them down.
Business$0
pay as you go, with an 8% fee on credit purchases
Everything in Standard plus advanced notifications, EU and US in-region routing and workload identity federation.
EnterpriseCustom
Priced by contract with fee discounts, SSO/SAML, contractual SLAs and a dedicated support team.
Common questions
Which is cheaper, LMArena or OpenRouter Chat?
As of Nov 13, 2026, LMArena has no price we could confirm, and OpenRouter Chat starts at $0, plus a 5.5% fee when you buy credits on Standard.
Which has a free plan, LMArena or OpenRouter Chat?
As of Nov 13, 2026, both LMArena and OpenRouter Chat have a free plan.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.