Human or Not 2

Human or Not 2 is an interactive AI evaluation platform that challenges users to distinguish between human and AI-generated conversational partners. The tool presents short, anonymous chat sessions where participants exchange messages in real time, then decide whether they were interacting with a person or an AI system. By aggregating these decisions across thousands of interactions, Human or Not 2 provides a large-scale, behavior-based assessment of how convincingly AI models can simulate human conversation.

Key capabilities include randomized matchmaking with either humans or AI agents, a simple chat interface that requires no technical expertise, and immediate feedback on each guess. The platform collects response patterns, accuracy rates, and behavioral signals, which can be used to analyze how people detect AI, what cues they rely on, and where AI systems still fall short of human-like communication.