Model & resolution
The sidebar and Direct Edit share image models and settings. Model, resolution and quality determine the base credit price per image. See Credits & rules.
Image models
| Model | Suggested use | Resolutions |
|---|---|---|
| gpt-image-2 | High-fidelity image creation | 1K, 2K |
| gpt-image-2.5-flare | Faster everyday creation and iterations | 1K, 2K |
| gpt-image-2.5-sunburst | Detailed image editing and refinement, as well as new images | 1K, 2K |
| Nano Banana 2 | Efficient preview | 512, 1K, 2K, 4K |
| Nano Banana 2 Lite | Fast generation | 1K only |
| Nano Banana Pro | High-quality preview | 1K, 2K, 4K |
| Nano Banana | Fast generation | 1K only |
GPT Image quality and aspect ratio
GPT Image 2, GPT Image 2.5 Flare, and Sunburst use model-specific base credits. The current open range is 1K / 2K with Low / Medium quality. Defaults are 1K, Low, Auto, and the estimated cost is shown before generation. See Credits & rules.
| Model | 1K Low | 1K Medium | 2K Low | 2K Medium |
|---|---|---|---|---|
| gpt-image-2 | 10 | 20 | 15 | 25 |
| gpt-image-2.5-flare | 8 | 12 | 10 | 20 |
| gpt-image-2.5-sunburst | 8 | 12 | 10 | 20 |
This GPT Image pricing update covers the 1K / 2K Low / Medium tiers. High and 4K are not in the current open range.
Existing smart-template and prompt-enhancement fees apply under their respective rules. LightReference is a separate lighting-editing feature; it does not use the sidebar GPT quality setting or the GPT Image quality matrix.
Available ratios are Auto, 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9 and 21:9. With input images, Auto follows the aspect ratio of the first image uploaded in the sidebar (the first image sent to the model); text-only generation defaults to a square image.
Switching models
Settings adjust to the new model's supported resolutions and ratios. Unsupported extreme ratios reset to Auto. Nano Banana and Nano Banana 2 Lite stay at 1K. Rerunning an image from History restores its saved model, quality, resolution and ratio.