Introducing the Model Arena
Send one prompt to up to four AI models in parallel and compare their outputs side-by-side.What's new
The Model Arena lets you run a single prompt against up to four models at once and compare their responses in real time.
Key features
- Side-by-side streaming — every selected model responds simultaneously
- Per-pane controls — swap models, tune temperature/top-p, set system prompts independently per pane
- Sync scroll — lock all panes to scroll proportionally for line-by-line comparison
- Latency stats — see how fast each model responded, color-coded by provider
- Stop / regenerate per pane — cancel a slow response without affecting the others
- Deep links — share a configured comparison:
/playgrounds/arena?models=anthropic/claude-opus-4.5,openai/gpt-4o&prompt=explain+quicksort
How to use it
- Open the Playgrounds menu and pick Arena
- Choose 2, 3, or 4 panes from the welcome card
- Pick a model in each pane, type your prompt, hit send
Arena is desktop-only — the side-by-side layout requires a screen 1024px or wider.