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Arena vs Big-AGI: catalog facts
Arena	Big-AGI
Free The site shows no paid plan; chatting and voting are open to visitors.	Freemium Open-source version is free; a Pro subscription costs $10.99 per month.
Web	Web, Self-hosted
Compare answers from different models on the same prompt Public leaderboard built from community votes	Works with many cloud providers and local model servers Beam compares and merges answers from several models
Prompts are sent to third-party AI providers Responses may be inaccurate, as the site itself notes	Cloud models require your own paid API keys Some features are part of the paid Pro tier
Web application	Web application, Self-hosted
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.