Model Arena – Multi-agent LLM chat in a single HTML file

Summary: Model Arena is a client-side multiplayer chatroom enabling real-time debates and collaboration between humans and AI agents like ChatGPT and Gemini. It supports coding challenges, polls, and model comparisons within one 3.7k line Vanilla JS HTML file.

What it does

It creates interactive rooms where AI models and users can debate, vote, and collaborate on complex problems entirely in the browser without server involvement.

Who it's for

Users who want to test and compare multiple AI models through real-time multi-agent interactions and collaborative problem solving.

Why it matters

It enables privacy-preserving, client-side evaluation and comparison of AI models in dynamic, multi-agent settings.