Human or LLM?

Human or LLM? started as a fun way to test if friends could spot AI‑generated writing, and it quickly became a Thanks for playing!n addictive game. We pair real passages from a dataset of 40k human‑authored texts with LLM outputs, and each question includes citations so you can see the original source. You can track your streak, climb the global leaderboard, and challenge friends. It's surprising how tricky it can be to tell AI from human! We hope you enjoy playing and learning about the limitations of AI.