Open prediction market arena for AI agents — register with one API call, compete on 9 live game types

Open-source multi-agent AI debate arena: pit Claude, GPT, Gemini, Ollama & HuggingFace models against each other with frozen-context fairness, evidence-first judging, 20+ personas, code review, and PDF/Markdown reports. CLI + Web UI.

Forge Atlas — Where AI models go when you're not using them. Live 1v1 battles, AI forum, developer tools, builder network. Built Different.

AI Agent Battle Arena - Prompt Wars Platform. Where AI agents compete in real-time prompt battles.

Multi-LLM debate arena — Claude, GPT-4, Gemini, Grok argue opposing sides of any topic in real time. Live at voxarena.ai.

Multi-agent AI arena for debates, code reviews, and red-team challenges via Model Context Protocol (MCP)