Nano Banana 2 Image Generation

Generate high-quality images using the next-generation Nano Banana 2 model with support for up to 4K resolution

Tool Overview

The Nano Banana 2 Image Generation tool is the next-generation version of Nano Banana, offering improved image quality and support for up to 4K ultra-high resolution output. It supports text-to-image generation and image editing with reference pictures.

Tool Identifier

nano-banana-image-2-api

Parameters

Required Parameters

prompt

Type: string (required)
Description: Text description of the image content to guide AI image generation or editing
Validation: Must be a non-empty string
Example: "A hyper-realistic portrait of a cyberpunk character with neon lighting"

Optional Parameters

image_list

Type: string[] (optional)
Default: [] (empty array, no reference images)
Format: Array of complete HTTP/HTTPS URLs (e.g., ["https://cdn.sjinn.ai/uploads/image.jpg"])
Validation: If provided, must be an array with non-empty string elements

aspect_ratio

Type: string (optional)
Default: "auto"
Supported Values:
- "auto" - Automatically select the optimal aspect ratio
- "1:1" - Square format
- "16:9" - Widescreen landscape
- "9:16" - Portrait mobile
- "4:3" - Standard landscape
- "3:4" - Standard portrait
- "9:21" - Ultra-wide portrait
- "21:9" - Cinematic landscape
- "2:3" - Classic portrait
- "3:2" - Classic landscape
Validation: If an unsupported value is provided, defaults to "auto"

resolution

Type: string (optional)
Default: "1K"
Supported Values:
- "1K" - Standard resolution
- "2K" - High resolution
- "4K" - Ultra-high resolution
Validation: If an unsupported value is provided, defaults to "1K"

Pricing

1K / 2K Resolution: 75 credits per task
4K Resolution: 150 credits per task

Request Examples

Text-to-Image

curl -X POST https://sjinn.ai/api/un-api/create_tool_task \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tool_type": "nano-banana-image-2-api",
    "input": {
      "prompt": "A breathtaking landscape of northern lights over snowy mountains",
      "aspect_ratio": "16:9"
    }
  }'

Image Editing with Reference

curl -X POST https://sjinn.ai/api/un-api/create_tool_task \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tool_type": "nano-banana-image-2-api",
    "input": {
      "prompt": "Enhance to professional photography quality with dramatic lighting",
      "image_list": ["https://cdn.sjinn.ai/uploads/photo.jpg"],
      "aspect_ratio": "16:9",
      "resolution": "2K"
    }
  }'

4K Ultra-High Resolution

curl -X POST https://sjinn.ai/api/un-api/create_tool_task \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tool_type": "nano-banana-image-2-api",
    "input": {
      "prompt": "A futuristic sci-fi cityscape with flying vehicles, cinematic lighting",
      "aspect_ratio": "21:9",
      "resolution": "4K"
    }
  }'

Using JavaScript

const response = await fetch('https://sjinn.ai/api/un-api/create_tool_task', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    tool_type: 'nano-banana-image-2-api',
    input: {
      prompt: 'A breathtaking landscape of northern lights over snowy mountains',
      aspect_ratio: '16:9',
      resolution: '2K',
    },
  }),
});

const result = await response.json();
console.log('Task ID:', result.data.task_id);

Using Python

import requests

url = 'https://sjinn.ai/api/un-api/create_tool_task'
headers = {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
}
data = {
    'tool_type': 'nano-banana-image-2-api',
    'input': {
        'prompt': 'A breathtaking landscape of northern lights over snowy mountains',
        'image_list': ['https://cdn.sjinn.ai/uploads/reference.jpg'],
        'aspect_ratio': '16:9',
        'resolution': '4K'
    }
}

response = requests.post(url, json=data, headers=headers)
result = response.json()
print('Task ID:', result['data']['task_id'])

Response Examples

Success Response

{
  "success": true,
  "errorMsg": "",
  "error_code": 0,
  "data": {
    "task_id": "550e8400-e29b-41d4-a716-446655440000"
  }
}

Error Response (Invalid Parameters)

{
  "success": false,
  "errorMsg": "prompt is required",
  "error_code": 400
}

Resolution Guide

1K Resolution (75 credits)

Generation Time: 10-30 seconds
Use Cases: Web, social media, quick prototyping

2K Resolution (75 credits)

Generation Time: 30-60 seconds
Use Cases: HD display, presentations, professional work

4K Resolution (150 credits)

Generation Time: 60-120 seconds
Use Cases: Large-format printing, ultra-HD display, commercial production

Best Practices

Prompt Optimization:
- Use detailed, specific descriptions for best results
- Include style, material, and lighting descriptions
- Professional photography terms work well (e.g., "bokeh", "golden hour", "HDR")
Resolution Selection:
- Use 1K during testing to save credits and time
- Use 2K for general professional work
- Reserve 4K for final deliverables requiring maximum detail
Reference Image Usage:
- Use high-quality reference images for best editing results
- For multi-image fusion, recommend no more than 3 images
Image URL Format:
- All image URLs in image_list must be complete HTTP/HTTPS addresses
- Ensure images are publicly accessible

Nano Banana 2 Image Generation