MuoGen · AI image model
Nano Banana 2.1 on MuoGen
Nano Banana 2.1 provides 1K/2K/4K settings and image references, with one output image per request in the MuoGen catalog.
Prepare an image brief with references and resolution choices
Compare Nano Banana 2.1 when you want to work on one image at a time with several reference images and a broad set of aspect ratios. Its model identifier is distinct from Nano Banana 2 and Nano Banana Pro.
Which settings are available?
| Model identifier | gemini-nano-banana-2.1 |
|---|---|
| Resolutions | 1K, 2K, 4K |
| Aspect ratios by resolution | 1K: 1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, 21:9 2K: 1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, 21:9 4K: 1:1, 1:4, 1:8, 2:3, 3:2, 3:4, 4:1, 4:3, 4:5, 5:4, 8:1, 9:16, 16:9, 21:9 |
| Initial settings | 1K, 1:1 |
| Maximum images per request | 1 |
| Maximum reference images | 14 |
| Size per reference image | 25 MB |
| Total reference image size | 100 MB |
| Maximum prompt length | 30000 characters |
These capabilities describe the settings exposed by MuoGen, not a guarantee of visual quality. Check the model and its settings in the workspace before preparing a request. Catalog checked on .
How do I prepare the prompt and references?
For a character reference, describe visible features, clothing, pose and background in clear groups. Use photographs only with permission, and explain which references define appearance rather than assuming all inputs will be treated equally.
Example brief to adapt
A full-length fictional character in a neutral standing pose, wearing a dark coat and light sneakers. Plain studio background, even lighting, clear view of clothing details.
This example is a preparation brief, not a generated result or a promise of output. Use only references you have the right to upload.
What limitations should I plan for?
A reference-based image does not guarantee perfect character consistency across later requests. Review facial features and clothing before using the result as a new reference. The catalog does not expose a selectable output format or background mode for this model.
Can I generate with this model today?
The catalog and settings are available to explore. Paid generation in the public browser workspaces is not yet open. When enabled, it will require a verified account and paid credits. Preparing a prompt or reading this guide does not start a generation.
Explore settings for Nano Banana 2.1
Compare and prepare your project
AI image preparation guide · MuoGen model catalog · Availability and frequently asked questions
- GPT Image 2.5 Sunburst: Prepare an image with quality, format and background controls
- GPT Image 2: Prepare an image with selectable formats and references
- Nano Banana Pro: Prepare an image with a broad choice of aspect ratios
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