CAMEL (Communicative Agents for Mind Exploration of Large Language Models) is an open-source framework for multi-agent AI systems, enabling the creation of societies of AI agents that collaborate on complex tasks through natural conversation. Developed from landmark academic research on role-playing AI agents, CAMEL provides tools for building diverse agent topologies including hierarchical teams, collaborative networks, and adversarial setups. The framework supports various reasoning patterns and integrates with popular LLMs, making it the go-to platform for multi-agent AI research.