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Gemini 3 Pro Image Generation
Gemini 3 Pro Image (Nano Banana Pro) is designed to solve the most challenging image generation tasks by integrating state-of-the-art reasoning capabilities. It is the best model for complex and multi-turn image generation and editing, with higher accuracy and superior image quality. It supports configurable image size, aspect ratio, and output format.

Request Headers

string
required
Enum value: application/json
string
required
Bearer authentication format: Bearer {{API key}}.

Request Body

string
default:"1K"
Pixel size of the output image (width*height). 1K (1024px), 2K (2048px), 4K (4096px). Defaults to 1K.Available values: 1K, 2K, 4K
object
Google Search options
string
required
The text prompt describing the image to generate
string
default:"1:1"
Aspect ratio of the generated imageAvailable values: 1:1, 3:2, 2:3, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9
string
default:"image/png"
MIME type of the output image. PNG, JPEG, and WebP formats are supported.Available values: image/png, image/jpeg

Response

string[]
required
List of generated image URLs
object
Model grounding metadata. Returned when Google server-side tools (such as Search) are called. Note: tool calls depend on Google. Enabling the parameter does not guarantee a tool call will be triggered 100% of the time.