This page is auto-generated from model configurations. Last updated: 2026-03-13.
This reference lists all available Google image generation models and their parameters. Use these parameter names when calling the Generation API.
- Gemini 2.5 Flash
- Gemini 3.0 Pro
- Gemini 3.1 Flash (Nano Banana 2)
- Imagen 3
- Imagen 3 Fast
- Imagen 4
- Imagen 4 Fast
- Imagen 4 Ultra
Gemini 2.5 Flash
Nano-banana is Google's state-of-the-art image generation and editing model
Model ID: model_google-gemini-2-5-flash-image-editing
Capabilities: txt2img, img2img
LLM Markdown: https://app.scenario.com/api/models/model_google-gemini-2-5-flash-image-editing/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
referenceImages | file_array | No | - | - | - | - | Reference images for style or content guidance |
prompt | string | Yes | - | - | - | - | Text prompt for image generation/editing |
aspectRatio | string | No | auto | - | - | 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16, auto | Aspect ratio for the generated image |
numOutputs | number | No | 1 | 1 | 4 | - | Number of images to generate |
seed | number | No | - | 0 | 2147483647 | - | Use a seed for reproducible results. Leave blank to use a random seed. |
Gemini 3.0 Pro
Nano Banana Pro (a.k.a Nano Banana 2) is Google's new state-of-the-art image generation and editing model
Model ID: model_google-gemini-pro-image-editing
Capabilities: txt2img, img2img
LLM Markdown: https://app.scenario.com/api/models/model_google-gemini-pro-image-editing/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
referenceImages | file_array | No | - | - | - | - | Reference images for style or content guidance |
prompt | string | Yes | - | - | - | - | Text prompt for image editing |
aspectRatio | string | No | auto | - | - | 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16, auto | Aspect ratio for the generated image |
resolution | string | No | 2K | - | - | 1K, 2K, 4K | Resolution for the generated image |
useGoogleSearch | boolean | No | false | - | - | - | Use Google Search to find more information about the prompt |
numOutputs | number | No | 1 | 1 | 4 | - | Number of images to generate |
seed | number | No | - | 0 | 2147483647 | - | Use a seed for reproducible results. Leave blank to use a random seed. |
Gemini 3.1 Flash (Nano Banana 2)
Nano Banana 2 combines Pro capabilities with Flash-tier speed — edit and generate images using multimodal understanding, up to 14 reference images, and natural language instructions for context-aware edits that preserve composition, lighting, and style coherence.
Model ID: model_google-gemini-3-1-flash
Capabilities: txt2img, img2img
LLM Markdown: https://app.scenario.com/api/models/model_google-gemini-3-1-flash/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Text prompt for image generation/editing |
referenceImages | file_array | No | - | - | - | - | Reference images for style or content guidance |
aspectRatio | string | No | auto | - | - | 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16, auto | Aspect ratio for the generated image |
resolution | string | No | 1K | - | - | 512, 1K, 2K, 4K | Resolution for the generated image |
useGoogleSearch | boolean | No | false | - | - | - | Use Google Search to find more information about the prompt |
numOutputs | number | No | 1 | 1 | 4 | - | Number of images to generate |
seed | number | No | - | 0 | 2147483647 | - | Use a seed for reproducible results. Leave blank to use a random seed. |
Imagen 3
Google's highest quality text-to-image model, capable of generating images with detail, rich lighting and beauty
Model ID: model_imagen3
Capabilities: txt2img
LLM Markdown: https://app.scenario.com/api/models/model_imagen3/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your image |
aspectRatio | string | No | 4:3 | - | - | 9:16, 3:4, 1:1, 4:3, 16:9 | Image aspect ratio |
Imagen 3 Fast
A faster and cheaper Imagen 3 model, for when price or speed are more important than final image quality.
Model ID: model_imagen3-fast
Capabilities: txt2img
LLM Markdown: https://app.scenario.com/api/models/model_imagen3-fast/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your image |
aspectRatio | string | No | 4:3 | - | - | 9:16, 3:4, 1:1, 4:3, 16:9 | Image aspect ratio |
Imagen 4
Google's Imagen 4 flagship model.
Model ID: model_imagen4
Capabilities: txt2img
LLM Markdown: https://app.scenario.com/api/models/model_imagen4/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your image |
aspectRatio | string | No | 4:3 | - | - | 9:16, 3:4, 1:1, 4:3, 16:9 | Image aspect ratio |
Imagen 4 Fast
Use this fast version of Imagen 4 when speed and cost are more important than quality.
Model ID: model_imagen4-fast
Capabilities: txt2img
LLM Markdown: https://app.scenario.com/api/models/model_imagen4-fast/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your image |
aspectRatio | string | No | 4:3 | - | - | 9:16, 3:4, 1:1, 4:3, 16:9 | Image aspect ratio |
Imagen 4 Ultra
Use this ultra version of Imagen 4 when quality matters more than speed and cost.
Model ID: model_imagen4-ultra
Capabilities: txt2img
LLM Markdown: https://app.scenario.com/api/models/model_imagen4-ultra/markdown
| Parameter | Type | Required | Default | Min | Max | Allowed Values | Description |
|---|---|---|---|---|---|---|---|
prompt | string | Yes | - | - | - | - | Describe your image |
aspectRatio | string | No | 4:3 | - | - | 9:16, 3:4, 1:1, 4:3, 16:9 | Image aspect ratio |
Updated about 4 hours ago