Models/google/nano-banana-pro

Nano Banana Pro

prospolabs/nano-banana-pro

Google's Gemini 3 Pro Image. Premium reasoning-based generation with the best compositional accuracy. Accepts up to 14 reference images for complex multi-element scenes.

GoogleImage to ImageCommercial useProtext-to-imageimage-to-imagereference

Up to 40% off

Starts from

$0.090/ image

Retail $0.150

Pay-as-you-go — no subscription, no tokens.

Call the Nano Banana Pro API on Prospolabs with a single POST to /v1/generate using model id nano-banana-pro and a mode field (one of: generate, edit). The API and the playground share the same USD price — $0.09 (1K/2K) or $0.18 (4K) per image — 40% off market. Each call returns a generation_id and an output_url valid for 7 days, and failed runs are auto-refunded.

Quickstart

Send a POST request to /v1/generate with your API key. The model id is nano-banana-pro and a mode field selecting which input shape you're sending..

Create an image from a text prompt.

curl -X POST "https://api.prospolabs.com/v1/generate" \
  -H "Authorization: Bearer $PROSPOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
        "model": "nano-banana-pro",
        "mode": "generate",
        "prompt": "Minimalist product photo of a ceramic coffee mug, soft light",
        "aspect_ratio": "1:1",
        "resolution": "1K",
        "num_images": 1,
        "output_format": "png",
        "safety_tolerance": "4",
        "enable_web_search": "false",
        "seed": 0
      }'

Backed by fal-ai/nano-banana-pro.

Supported parameters for Generate

Parameter	Type	Default	Notes
mode	string	generate	Required. One of: generate, edit.
prompt	string	—	Required.
aspect_ratio	string	1:1	One of: auto, 1:1, 21:9, 16:9, 3:2, 4:3, 5:4, 4:5, 3:4, 2:3, 9:16.
resolution	string	1K	One of: 1K, 2K, 4K.
num_images	number	1	Range: 1–4.
output_format	string	png	One of: png, jpeg, webp.
safety_tolerance	string	4	One of: 1, 2, 3, 4, 5, 6.
enable_web_search	string	false	One of: false, true.
seed	number	—

Response

{
  "generation_id": "gen_abc123",
  "status": "completed",
  "model": "nano-banana-pro",
  "mode": "generate",
  "estimated_cost_usd": 0.60,
  "output_url": "https://cdn.prospolabs.com/...",
  "duration_ms": 2143
}

Output retention: output_url is valid for 7 days after generation. After that, requests return HTTP 410 Gone with { "code": "output_expired" }. Download anything you want to keep.