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Arena vs LMSYS Chatbot Arena Leaderboard
A side-by-side comparison of pricing, ratings, features, pros and cons.
| Overview | |||
| Description | An open platform for crowdsourced AI benchmarking, hosted by researchers at UC Berkeley SkyLab. | LMSYS Chatbot Arena is a crowdsourced open platform for LLM evals. Collected over 1,000,000 human pairwise comparisons to rank LLMs with the Bradley-Terry model and display the model ratings in Elo-scale. | |
| Category | |||
| Developer | Arena | Lmarena | |
| Verified Status | No | No | |
| Last Updated | Sep 2026 | Sep 2026 | |
| Pricing | |||
| Pricing Model | Pricing not yet verified | Free | |
| Free Plan | No | Yes | |
| Open Source | — | No | |
| Capabilities | |||
| Tags | arenaopencrowdsourcedbenchmarkinghostedresearchers | arenamodelleaderboardcrowdsourcedlmsys-chatbot | |
| Trust and Engagement | |||
| Review Count | 0 | 0 | |
| Saves | 0 | 0 | |
| Views | 51 | 54 | |
| Quality Score | 58/100 | 62/100 | |
| Website Status | Online | Online | |
| Availability | |||
| Website | arena.ai | lmarena.ai | |
| Social Links | 2 linked | 2 linked | |
| Screenshots | No | No | |
| Reviews | |||
| Pros | — | • Free to use | |
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