LMArena
Chat, compare, vote for the world's best AI models. Join the community shaping the public leaderboard for LLMs, image, and code models through real-world e
Our verdict
In its own words, LMArena is chat, compare, vote for the world's best AI models. Join the community shaping the public leaderboard for LLMs, image, and code models through real-world e. Neither a free tier nor a public price list, which usually means pricing is quote-based and you will be talking to sales. Developer documentation is published, though there is no public changelog. We have not verified the prices by hand, so we do not quote them here. Everything above was checked on 2026-08-26.
Pricing
- Free tierNo
- Public price listNot published
LMArena does not publish a web price list. For consumer apps that usually means pricing appears inside the product; for enterprise tools it means talking to sales. Why we do this
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No one has reviewed LMArena here yet. Reviews are moderated before they appear, and our own score is editorial and separate from user ratings, though once reviews land they do lift it.
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Weights & Biases
Weights & Biases, developer tools for machine learning
Side by side
| Tool | Our score | From | Free tier | Best for | |
|---|---|---|---|---|---|
| LMArena this page | 2.5 | — | — | ||
| Transformers | 7.9 | — | Yes | ||
| Ultralytics | 7.7 | — | Yes | ||
| vLLM | 7.5 | — | Yes | ||
| LlamaFactory | 7.3 | — | Yes | ||
| PyTorch | 6.6 | — | Yes | ||
| Weights & Biases | 6.2 | $60 | Yes |
Questions
Is LMArena free?
We found no free tier or trial advertised on LMArena’s own site. Check the vendor’s pricing page, since this can change.
How much does LMArena cost?
LMArena does not publish pricing openly, which usually means it is quote-based. You will need to contact the vendor.
Does LMArena have an API or developer docs?
Yes, LMArena publishes developer documentation.
How is LMArena scored here?
LMArena scores 2.5 out of 10. That comes from a desk review of public evidence, which is capped at 8.5 out of 10: public pricing, documentation, maintenance signals and how much we could actually verify. Affiliate relationships are excluded from scoring entirely. The full rubric is published on our methodology page.