GPT Image 2.5
OpenAI
The only model here that renders true 4K in a portrait frame — 2881×3840, not an upscale. OpenAI's newest image model. Best-in-class legible text, and the only one that renders true 4K in portrait ratios. Cannot take pixel sizes or masks — use GPT Image 2 for those.
Using GPT Image 2.5 in uooki
uooki has no model picker. You name the model in the conversation and the agent routes to it — “draw the packaging mockup with GPT Image 2.5” is the whole interface. Common spellings and older ids resolve to the same model, so you do not have to match our internal naming.
Leave the model out and the agent picks one for you based on what you asked for. Naming it is for when you have a reason to — this page is about those reasons.
What it is good at
- Poster and cover art in portrait, where the text has to stay crisp at full size
- Anything that will be printed or shown on a phone at full bleed
- Legible text inside the image — same strength as GPT Image 2, at a lower price per render
Where it is not the right pick
It will not take a pixel size — only named ratios — and it has no mask field, so it cannot do a masked local repaint. Both of those stay on GPT Image 2. It also runs on a single provider, so it is not the model to lean on when you need a guaranteed render.
When to reach for something else
- GPT Image 2
You need a masked repaint, or you are passing an exact pixel size rather than a ratio.
- Nano Banana
The same subject has to survive across a whole series of images.
Specifications
| Type | Image generation |
|---|---|
| Billing | Billed per generated image. |
| Plan | Available on every plan |
| Reference images | Up to 5 |
| Text in image | Renders legible text |
| Credits | See pricing |
Specifications are read from uooki’s model registry, not written by hand — if the registry changes, this table changes with it.
Model id
What uooki calls upstream when you pick GPT Image 2.5. You never need this to use it — it is here so the vendor name and the actual model are unambiguous.
Try it in a sentence.
Describe what you want and name GPT Image 2.5 in the same breath. The Free plan is $0 and starts with 100 one-time credits.