GoogleFastHigh

Nano Banana

Google Gemini 2.5 Flash-based image generation with multimodal editing capabilities. Fast and versatile for both creation and editing tasks.

70 credits

per image

Gemini 2.5 Flash-powered generation

Multimodal image editing

Fast generation speed

Multiple aspect ratio support

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txt

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "google/nano-banana",
  "input": {
    "prompt": "Whimsical illustration of a cat astronaut floating in space with planets and stars, colorful and playful style",
    "aspect_ratio": "1:1"
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text description of the image to generate or editing instructions
`image_input`	array	No	-	Input image URL array for transformation/reference
`aspect_ratio`	string	No	1:1	Output aspect ratio match_input_image1:12:33:23:44:34:55:49:1616:921:9
`output_format`	string	No	jpg	Output image format jpgpngwebp

How to Provide File Input

There are 3 ways to provide files for the image_input parameter:

Recommended

Direct Upload (Multipart)

Attach files directly to POST /v1/predictions/upload. No separate upload step needed.

curl -X POST "https://api.core.today/v1/predictions/upload" \
  -H "X-API-Key: cdt_your_api_key" \
  -F "model=google/nano-banana" \
  -F 'input={"prompt":"your prompt here"}' \
  -F "file:image_input=@your_file.png"

Image URL

Pass a publicly accessible URL directly. You can also use file_url from the Storage API.

{
  "model": "google/nano-banana",
  "input": {
    "prompt": "your prompt here",
    "image_input": ["https://example.com/image.jpg"]
  }
}

See the File Upload docs for more upload methods including Presigned URLs.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Creative Illustration

Generate a creative illustration with Gemini

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "google/nano-banana",
  "input": {
    "prompt": "Whimsical illustration of a cat astronaut floating in space with planets and stars, colorful and playful style",
    "aspect_ratio": "1:1"
  }
}'