How It Works
ModelChorus lets you compare AI models head-to-head in blind challenges. Submit a prompt, judge the responses, and help build a community-driven leaderboard.
Input your Prompt
Use a suggestion button or write your own prompt. When you submit, two anonymous models receive it and generate responses in real time.
Compare Answers
Read both responses side-by-side. Judge quality, accuracy, style, and reasoning — without knowing which model wrote which.
Vote for the Best
Pick the response you prefer, or call it a tie. Your vote feeds into our Elo rating system, helping rank models across topics and languages.
Discover & Repeat
After voting, the model names are revealed. Continue chatting in the same thread or start a fresh comparison with a new prompt.
Elo Rating System
Every vote updates model rankings using the Elo rating system — the same method used in chess. Win streaks push models up; losses pull them down. The leaderboard reflects real community preferences.
Transparency & Privacy
We keep the evaluation process transparent while respecting your privacy. Review our policies for details on data handling.