Gemini 3.1 Flash Image Preview - Image Generator

Fast and efficient AI image generation model by Google AI. Gemini 3.1 Flash Image Preview delivers high-quality image generation optimized for speed, supporting flexible aspect ratios and multiple image sizes for a wide range of creative and commercial applications.

Endpoint

POSThttps://api.1min.ai/api/features

Request Headers

Field	Value
API-KEY	<api-key>
Content-Type	application/json

Parameters

Parameter	Type	Required	Description
type	string	Yes	Feature type identifier. Must be IMAGE_GENERATOR
model	string	Yes	AI model identifier. Must be gemini-3.1-flash-image-preview
promptObject	object	Yes	Configuration object containing all generation parameters

Prompt Object Parameters

Parameter	Type	Required	Description	Default
prompt	string	Yes	Text description of the image to generate	-
imageSize	string	Yes	Image size quality. Must be one of: "512", "1K", "2K", or "4K"	1K
aspectRatio	string	No	Aspect ratio for the generated image. Must be one of: "1:1", "1:4", "1:8", "2:3", "3:2", "3:4", "4:1", "4:3", "4:5", "5:4", "8:1", "9:16", "16:9", "21:9"	-
temperature	number	No	Controls randomness in generation (0.0-2.0). Higher values produce more creative results	1.0
topP	number	No	Nucleus sampling parameter (0.0-1.0). Controls diversity of output	0.95

Code Examples

cURL

curl --location 'https://api.1min.ai/api/features' \
--header 'API-KEY: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"type": "IMAGE_GENERATOR",
"model": "gemini-3.1-flash-image-preview",
"promptObject": {
  "prompt": "A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings",
  "imageSize": "2K",
  "aspectRatio": "16:9",
  "temperature": 1.0,
  "topP": 0.95
}
}'

JavaScript

fetch('https://api.1min.ai/api/features', {
method: 'POST',
headers: {
  'Content-Type': 'application/json',
  'API-KEY': 'YOUR_API_KEY'
},
body: JSON.stringify({
  type: 'IMAGE_GENERATOR',
  model: 'gemini-3.1-flash-image-preview',
  promptObject: {
    prompt: 'A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings',
    imageSize: '2K',
    aspectRatio: '16:9',
    temperature: 1.0,
    topP: 0.95
  }
})
})

Python

import requests

url = "https://api.1min.ai/api/features"
headers = {
"Content-Type": "application/json",
"API-KEY": "YOUR_API_KEY"
}

data = {
"type": "IMAGE_GENERATOR",
"model": "gemini-3.1-flash-image-preview",
"promptObject": {
"prompt": "A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings",
"imageSize": "2K",
"aspectRatio": "16:9",
"temperature": 1.0,
"topP": 0.95
}
}

response = requests.post(url, headers=headers, json=data)

Interactive Playground

API Playground

GETPOSTPUTDELETEhttps://api.1min.ai/api/features

AI Model *Gemini 3.1 Flash Image Preview - Google AI

Prompt *

Describe the image you want to generate

A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings

Image Size *

Image size quality. Must be one of: 512, 1K, 2K, or 4K

512 - Fast generation1K - Standard quality2K - High quality4K - Ultra-high quality

Aspect Ratio

Aspect ratio for the generated image

1:11:41:82:33:23:44:14:34:55:48:19:1616:921:9

Temperature

Controls randomness (0.0-2.0). Higher = more creative

Top P

Nucleus sampling parameter (0.0-1.0). Controls diversity

Generated cURL Command:

curl -X POST "https://api.1min.ai/api/features" \
  -H "API-KEY: <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{
  "type": "IMAGE_GENERATOR",
  "model": "gemini-3.1-flash-image-preview",
  "promptObject": {
    "prompt": "A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings",
    "imageSize": "2K",
    "aspectRatio": "16:9",
    "temperature": 1,
    "topP": 0.95
  }
}'

Response Format

{
"aiRecord": {
  "uuid": "e4f5g6h7-i8j9-0123-4567-890123defghi",
  "userId": "user-12345",
  "teamId": "team-67890",
  "model": "gemini-3.1-flash-image-preview",
  "type": "IMAGE_GENERATOR",
  "status": "SUCCESS",
  "createdAt": "2025-01-15T10:50:00.000Z",
  "aiRecordDetail": {
    "promptObject": {
      "prompt": "A futuristic cityscape at sunset with flying vehicles and neon lights reflecting on glass buildings",
      "imageSize": "2K",
      "aspectRatio": "16:9",
      "temperature": 1.0,
      "topP": 0.95
    },
    "resultObject": [
      "development/images/2025_01_15_10_50_45_001_futuristic_cityscape.png"
    ]
  },
  "temporaryUrl": "https://s3.us-east-1.amazonaws.com/asset.1min.ai/development/images/2025_01_15_10_50_45_001_futuristic_cityscape.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&..."
}
}

Use Cases

• Creative Content: High-quality imagery for social media and digital marketing
• Professional Design: Business visuals, presentations, and brand assets
• Product Visualization: Product imagery and concept visualization
• Marketing Materials: Visuals for campaigns with flexible aspect ratios for different platforms
• Digital Art: Illustrations and artistic creations at multiple resolutions
• Content Optimization: Fast, cost-effective image generation for high-volume use cases