Arena AI

Compare AI models in real-time with crowdsourced voting and the most reliable LLM leaderboard.

Arena AI (previously LMSYS Chatbot Arena) is the reference platform for impartial AI model comparisons. Its 'Battle' mode lets you chat with two models simultaneously without knowing which is which, and vote on which responds better — generating a crowdsourced Elo ranking considered the most reliable in the industry. It compares text, images, vision, code, and more all in one place. The leaderboard includes all frontier models: GPT-5, Claude Opus, Gemini, Llama, and many more. Ideal for teams that need to choose the right model for their use case without relying solely on academic benchmarks.

// Use cases

• ▸Comparar dos modelos AI de forma ciega para elegir el mejor para tu tarea
• ▸Consultar el ranking más actualizado de modelos de lenguaje
• ▸Evaluar modelos de imagen, visión y código lado a lado
• ▸Entender las fortalezas reales de cada modelo con datos de millones de votos
• ▸Seleccionar el modelo óptimo antes de integrar una API en tu producto

// Frequently asked questions