Model-specific Buble API parameters, modes, pricing, and examples for Nano Banana.

Nano Banana API

Nano Banana is suited for fast image generation and practical image-to-image transformations.

Model keys

google/nano-banana — Nano Banana

Supported modes and inputs

Model	Mode	Label	Input requirements
`google/nano-banana`	`text_to_image`	Text to Image	Prompt max 5000 chars
`google/nano-banana`	`image_to_image`	Image to Image	Prompt max 5000 chars Images `reference`: 1-10 files, 30 MB, formats jpg, png, webp, bmp, gif

Options

Model	Option	Default	Allowed values	Applies to
`google/nano-banana`	`output_format`	`png`	`png`, `jpeg`	All modes
`google/nano-banana`	`aspect_ratio`	`1:1`	`1:1`, `16:9`, `9:16`, `4:3`, `3:4`, `3:2`, `2:3`, `5:4`, `4:5`, `21:9`, `auto`	All modes

Pricing

Model	Pricing
`google/nano-banana`	1 credit per image

Production guidance

Pass mode explicitly.
Use only option values listed above.
Upload media with POST /api/v1/files before calling media-input modes.
Use the exact model key for the variant you want.

Example: text to image

curl https://buble.ai/api/v1/generations \
  -H "Authorization: Bearer $BUBLE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/nano-banana",
    "mode": "text_to_image",
    "prompt": "A premium editorial product image of a minimalist ceramic coffee grinder on a warm walnut counter, soft studio lighting",
    "aspect_ratio": "1:1",
    "output_format": "png"
  }'

Example: image to image

Upload an image first, then pass the returned URL to image_urls.

curl https://buble.ai/api/v1/generations \
  -H "Authorization: Bearer $BUBLE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/nano-banana",
    "mode": "image_to_image",
    "prompt": "Transform the source into a clean commercial product image while preserving the main object",
    "image_urls": ["https://example.com/source.png"],
    "aspect_ratio": "1:1",
    "output_format": "png"
  }'

Nano Banana API

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