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That one website that compares AI models side by side so you can see which is better

Why it's the pick

Formerly LMArena, it's the public leaderboard where you type one prompt, get answers from two anonymous models and vote, or pick the exact models yourself in side-by-side mode. It's free, but your conversations can end up in de-identified public research datasets and be shared with AI companies, so don't paste anything private.

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2 good alternatives

OpenRouter Chat openrouter.ai Send one prompt to several models at once; some are free Free tierSignup optional Link checked Oct 9
Artificial Analysis artificialanalysis.ai Independent charts comparing AI models on smarts, speed and price FreeNo signup Link checked Oct 9

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