Inputs
| Parameter | Description | Data Type | Required | Range |
|---|---|---|---|---|
prompt | Text prompt describing the image to generate or the edits to apply. Include any constraints, styles, or details the model should follow. | STRING | Yes | N/A |
model | The specific Gemini model to use for generation. The “Nano Banana 2” option maps to the gemini-3.1-flash-image-preview model internally. | COMBO | Yes | "gemini-3-pro-image-preview""Nano Banana 2 (Gemini 3.1 Flash Image)" |
seed | When fixed to a specific value, the model makes a best effort to provide the same response for repeated requests. Deterministic output isn’t guaranteed. Changing the model or other settings can cause variations even with the same seed. Default: 42. | INT | Yes | 0 to 18446744073709551615 |
aspect_ratio | The desired aspect ratio for the output image. If set to ‘auto’, it matches your input image’s aspect ratio; if no image is provided, a 16:9 square is usually generated. Default: “auto”. | COMBO | Yes | "auto""1:1""2:3""3:2""3:4""4:3""4:5""5:4""9:16""16:9""21:9" |
resolution | Target output resolution. For 2K/4K the native Gemini upscaler is used. | COMBO | Yes | "1K""2K""4K" |
response_modalities | Choose ‘IMAGE’ for image-only output, or ‘IMAGE+TEXT’ to return both the generated image and a text response. | COMBO | Yes | "IMAGE+TEXT""IMAGE" |
images | Optional reference image(s). To include multiple images, use the Batch Images node (up to 14). | IMAGE | No | N/A |
files | Optional file(s) to use as context for the model. Accepts inputs from the Gemini Generate Content Input Files node. | CUSTOM | No | N/A |
system_prompt | Foundational instructions that dictate an AI’s behavior. Default: A pre-defined system prompt for image generation. | STRING | No | N/A |
- The
imagesinput supports a maximum of 14 images. If more are provided, an error will be raised. - The
filesinput must be connected to a node that outputs theGEMINI_INPUT_FILESdata type.
Outputs
| Output Name | Description | Data Type |
|---|---|---|
image | The image generated or edited by the Gemini model. | IMAGE |
string | The text response from the model. This output will be empty if response_modalities is set to “IMAGE”. | STRING |
This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! Edit on GitHub
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