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LMSYS Chatbot Arena logo

LMSYS Chatbot Arena

ResearchFree
★4.6

The gold standard for AI model comparison. Chat with 40+ anonymous models side-by-side and vote on which responds better. Powers the widely-cited Elo leaderboard.

Key Features

  • ✓40+ models available
  • ✓Blind A/B comparison
  • ✓Elo rating leaderboard
  • ✓Unlimited free usage
  • ✓Academic-backed
  • ✓Multiple evaluation modes

👍 Pros

  • +Completely free
  • +Unbiased model comparison
  • +Industry-standard rankings
  • +Great for research

👎 Cons

  • −Not for production use
  • −Random model assignment
  • −Academic interface

Tags

comparisonbenchmarkleaderboardresearchfree
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PricingFree
CategoryResearch
Rating
★4.6
AddedApr 4, 2026
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