Nano Banana Pro

gemini-3-pro-image-preview

Get API keyAPI reference

Nano Banana Pro is Google's most advanced image generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana, significantly improving multimodal reasoning, real-world grounding, and high-fidelity visual synthesis. The model generates context-rich graphics, from infographics and charts to cinematic composites, and can incorporate real-time information via search grounding. It offers industry-leading image text rendering (including long paragraphs and multilingual layouts), consistent multi-image blending, and accurate identity preservation for up to five subjects. Nano Banana Pro adds fine-grained creative controls such as localized editing, lighting and focus adjustments, camera transitions, and support for 2K/4K output and flexible aspect ratios. It is designed for professional-grade design, product visualization, storyboards, and complex multi-element compositions, while maintaining efficiency for general image creation workflows.

Context window66K

ProviderGemini

Released2026/04/08

Playground

Pricing

The same model is available through multiple service channels — choose based on latency, reliability and cost.

Prices in $ / 1M tokens

To pick a channel, add a provider field to the request body, for example "provider": { "channel": "direct" }. Valid values are direct / stable / economical; omit it to use the default channel.

Direct

Direct upstream connection — best when you need native behavior and the full context window.

Input	Output
2.00/M	120.00/M

Overview

Input

Text

Output

Image

API

API integration

Model ID

gemini-3-pro-image-preview

Use this value as the model in image generation requests

API Key

View it in API key management

Bearer token (OAuth 2.0) used to authenticate image generation requests

Image API

https://api.seawhaleai.com/v2/images/generations

Image size

1:1

Square — avatars and icons

2:3

Portrait — phone wallpapers and posters

3:2

Landscape — scenery and banners

3:4

Portrait — Instagram vertical

4:5

Portrait — social media content

5:4

Landscape — presentation slides

9:16

Vertical — full-screen mobile and Stories

16:9

Widescreen — video thumbnails and desktop wallpapers

21:9

Ultrawide — cinematic framing

Multiple aspect ratios are supported for different use cases — social media, ads, wallpapers and more.

gemini-3-pro-image-preview usage examples

The SeaWhale AI image generation endpoint is compatible with the OpenAI Images API and can be called with standard HTTP requests.

cURL

curl https://api.seawhaleai.com/v2/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <API_KEY>" \
  -d '{
    "model": "gemini-3-pro-image-preview",
    "prompt": "A cute kitten playing in the sunshine",
    "aspect_ratio": "1:1"
  }'

Python

import requests

url = "https://api.seawhaleai.com/v2/images/generations"
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer <API_KEY>",
}
payload = {
    "model": "gemini-3-pro-image-preview",
    "prompt": "A cute kitten playing in the sunshine",
    "aspect_ratio": "1:1",
}

response = requests.post(url, json=payload, headers=headers)
response.raise_for_status()

data = response.json()
print(data["data"][0]["url"])

Node.js

const response = await fetch('https://api.seawhaleai.com/v2/images/generations', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer <API_KEY>',
  },
  body: JSON.stringify({
    model: 'gemini-3-pro-image-preview',
    prompt: 'A cute kitten playing in the sunshine',
    aspect_ratio: '1:1',
  }),
})

const data = await response.json()
console.log(data.data[0].url)