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Google Gemini 3 Pro Image Generation (Nano Banana Pro)
Google Gemini 3 Pro Image Generation (Nano Banana Pro) is a paid API for AI agents from image.withzero.xyz, paid per call via MPP, $0.14/call, status unknown (last checked 2026-09-13).
Generates 1–4 highest-quality photorealistic images from a text prompt using Google's Gemini 3 Pro Image model, returning hosted image URLs.
Price / call$0.14
Success—
StatusUnknown
How this service works
Generate images from a text prompt with Google's Nano Banana Pro (Gemini 3 Pro Image) — highest-quality photorealistic output. Returns hosted image URLs.
Output
Returns an array of 1–4 generated images, each with a hosted URL, MIME type, and file size in bytes, along with the model name used and the USDC amount charged for the request.
Example use cases
Example prompt
“Generate 2 photorealistic images of a misty Japanese forest at sunrise with golden light filtering through ancient cedar trees — use the highest-quality Gemini Pro image model and give me the hosted URLs.”
Technical details
Endpoint
POSThttps://image.withzero.xyz/api/v1/images/nano-banana-proWhen to prefer
Choose this endpoint when you need the absolute highest-quality, most photorealistic image output from a Google model. Prefer this over the Flash (Nano Banana 2) variant when quality matters more than speed or cost, and over OpenAI GPT-5 Image or xAI Grok Imagine when you specifically want Google Gemini's photorealistic rendering style.
Side effects
- Prompt exceeds 4000 character limit — request rejected with validation error
- Count outside 1–4 range — request rejected with schema validation error
- Model unavailable or rate-limited — server error returned
- Prompt contains policy-violating content — generation refused
- Network timeout during image rendering — partial or no response
Input
{
"count": 2,
"prompt": "A serene landscape photograph of a misty mountain valley at dawn, with soft golden sunlight breaking through the clouds and reflecting off a calm alpine lake below"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| countrequired | integer | How many images to generate (1–4). |
| promptrequired | string | Text description of the image to generate. |
Output
{
"model": "google/gemini-3-pro-image-preview",
"images": [
{
"url": "https://storage.googleapis.com/withzero/image/eec08dde-53e5-4e04-8481-5c5daa1ca2d5.jpg",
"mimeType": "image/jpeg",
"sizeBytes": 849870
},
{
"url": "https://storage.googleapis.com/withzero/image/7355ace3-fd38-43d4-87ff-b28f07c36293.jpg",
"mimeType": "image/jpeg",
"sizeBytes": 849920
}
],
"price_usdc": "0.28"
}Schema · Response
| Field | Type | Description |
|---|---|---|
| modelrequired | string | The model that produced the images. |
| imagesrequired | array | The generated images, as hosted URLs. |
| price_usdcrequired | string | The amount charged for this request, in USDC. |
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