Nano Banana vs GPT Image: a spec comparison
Nano Banana and GPT Image both generate from text and edit from photos, and both reach 4K. GPT Image 2 and 2.5 take up to 16 references, let you type a custom frame size and pick a quality level. Nano Banana 2 takes up to 14 photos and outputs 1K, 2K or 4K, and the base Nano Banana handles local edits.
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Nano Banana and GPT Image specs side by side
| Parameter | Nano Banana | GPT Image |
|---|---|---|
| Developer | OpenAI | |
| Versions | Nano Banana 2, Nano Banana Pro, Nano Banana | GPT Image 2.5 Flare, GPT Image 2.5 Sunburst, GPT Image 2, GPT Image 1.5, GPT-4o Image |
| Modes | text to image, edit from photos | text to image, edit from photos |
| Resolution | 1K, 2K, 4K | 1K, 2K, 4K, custom size |
| Aspect ratios | 1:1, 9:16, 16:9, 21:9, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4 | 1:1, 9:16, 16:9, 3:4, 4:3, 2:3, 3:2, 4:5, 5:4, 21:9 |
| References | up to 14 images | up to 16 images |
| Prompt | up to 4,000 characters | up to 32,000 characters |
| Price from | from 4 tokens | from 2 tokens |
When to use Nano Banana
- You need up to 14 photos in one frame and 4K: that is Nano Banana 2.
- Fast, precise edits matter: Nano Banana Pro is built for them.
- You need to edit part of an image: the base Nano Banana does local edits.
When to use GPT Image
- You need a custom size in pixels: GPT Image 2 and 2.5 have it.
- You want control over quality: five levels on GPT Image 2.5, three on GPT Image 2.
- Your prompt is long: GPT Image 2.5 takes up to 32,000 characters.
- The image will contain text: GPT Image 1.5 and GPT-4o Image render it accurately.
Model pages
Nano Banana
images up to 4K
up to 14 references
from 4 tokens
GPT Image
images up to 4K
up to 16 references
from 2 tokens
Frequently asked questions
Which one takes more references?
GPT Image 2 and 2.5, with up to 16 photos. Nano Banana 2 takes up to 14, Nano Banana Pro and the base Nano Banana up to 4.
Which one does 4K?
Both: Nano Banana 2 and Pro, GPT Image 2 and both 2.5 versions.
Can I set a custom frame size?
Only in GPT Image 2 and 2.5. In Nano Banana the size comes from an aspect ratio in the list.
Which one takes longer prompts?
GPT Image 2.5, with up to 32,000 characters. Nano Banana and the other GPT Image versions take up to 4,000.
How much does each cost?
The token price depends on the version, resolution, quality and number of variants. The run button shows the exact amount.