Slop or not

Slop or Not is a browser game and research project that tests how well people can tell AI written text from human text. Each round shows two responses to the same prompt. One was written by a real person and the other by an AI model, and the player picks which is which. Three wrong guesses end the run, and a full breakdown of results appears at the end. As players improve, the AI responses become harder to spot. The human text comes from real internet sources: comments from popular Reddit communities such as AskReddit, explainlikeimfive and personalfinance, top level Hacker News comments on popular stories, and Yelp reviews. Players can choose to play against all sources or just one. The AI responses come from modern language models trying to blend in. Every guess contributes to a dataset on human ability to detect AI generated text. The site's creator, a software engineer based in Seattle, built it to study how language models behave in the wild and whether people can distinguish them from humans at scale. It is a game rather than a detection service, so it does not analyze text a user supplies. The site publishes no pricing and presents no paid plans.