LM Arena

LM Arena is a public AI benchmarking platform where users compare two models blindly and vote on the best outputs.

LM Arena is a public AI benchmarking platform where users test and compare different artificial intelligence models. The platform features a battle mode to pit two anonymous models against each other, an agent mode built for complex tasks, and a side-by-side view to compare two models of choice. Users can also engage in direct chat with one model at a time. It serves developers, researchers, and AI enthusiasts who want to evaluate and vote on model performance. The interface provides straightforward options to test capabilities without requiring complex setup.

LM Arena at a glance

Best for: Software engineer, Researcher, Student
Runs on: Web
Pricing: Free
Released: April 2023
Category: AI chat assistant
Website: arena.ai

Key features

Battle mode with two anonymous models
Agent mode for complex tasks
Side-by-side model comparison
Direct chat with single models
Blind voting on best outputs

Use it for

Compare two AI models blindly
Test models with complex agent tasks
Chat directly with a single AI model

Alternatives to LM Arena

LLM Stats — Independent rankings updated continuously from live API metrics.
Meow AI Arena — Access complete match materials, original AI code, and local challenge scripts.
Chat Brawlers — Three different models debate questions and reach consensus.
Fightbench — It tests artificial intelligence models on game memory rather than pixels.
Ollama — Run open models locally or in the cloud with private prompts
LM Studio — Runs open source language models locally with real-time voice transcription.
OpenCompass — It offers an objective, comprehensive, and credible open-source AI evaluation system.
StrictLLM — It keeps your AI workflows secure and reviewable with sandboxed MCP servers and strict tool permissions.
RikkaHub — Integrates a Linux workspace for AI agents on Android devices.
llmspy.org — Self-host access to 530+ AI models across 24 providers with built-in tools.
Araveil — Automatically routes messages to the best AI model
Open WebUI — Run AI on your own terms with complete data privacy and self-hosting control.

All LM Arena alternatives