How to Try GPT-Image-2.5 Sunburst Free on Arena

Got a project that needs images and no budget to pay for them? Arena has opened up its newest image model to everyone for a short window, and it costs nothing to use.

GPT-Image-2.5 Sunburst is normally locked behind paid access, and the free run lasts 72 hours. That is the whole catch — after those three days it goes back behind the wall.

Tutorial

1. Go to http://arena.ai. That is the only address you need; there is no separate signup page to hunt for.
2. Open Direct Mode. It is the option Arena gives you for talking to a model straight, without a preset workflow in the way.
3. Select GPT-Image-2.5 Sunburst. Pick it by that exact name so you land on the unlocked model and not one of the others.
4. Start generating. Prompts are free while the window is open, so this is the moment to push it as far as it goes.

Wrapping Up

You have a free shot at a model that usually costs money, and you have 72 hours to use it. Go in with the prompts you have been putting off, and get the images you need out of it before the timer runs out.