Same prompt, several models
Pick the contenders, send one prompt, and compare the output side by side. Mix local and cloud models in the same race to find out whether the paid one is actually worth it for your work.
It answers a real question
The useful question is not which model is best in general, it is whether a 7B on your own GPU is good enough for your codebase. Arena is how you find out before paying for anything.
What it does not do
Arena is on a 14-day trial and then part of the Pro plan. Local models remain free with or without it.