Flux Pro 1.1 - Image Generator

Premium AI image generation model by Black Forest Labs. Flux Pro 1.1 delivers state-of-the-art image quality with advanced controls, custom resolution support, safety tolerance settings, and professional-grade output for demanding creative 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 black-forest-labs/flux-1.1-pro
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	-
image_prompt	string	No	Path to input image from Asset API for image-to-image generation	-
aspect_ratio	string	No	Image aspect ratio (1:1, 16:9, 9:16, 3:2, 2:3, 4:5, 5:4, custom)	1:1
width	number	No	Custom image width in pixels (when aspect_ratio is "custom")	1024
height	number	No	Custom image height in pixels (when aspect_ratio is "custom")	1024
output_quality	number	No	Output image quality (0-100)	80
safety_tolerance	number	No	Safety filtering tolerance level (0-5)	2
prompt_upsampling	boolean	No	Enable automatic prompt enhancement	false
seed	number	No	Random seed for reproducibility (0-4294967295)	Random

Supported Aspect Ratios

Ratio	Use Case
1:1	Square images, social media posts
16:9	Widescreen, video thumbnails
9:16	Vertical video, mobile screens
3:2	Standard photography
2:3	Portrait photography
4:5	Instagram posts
5:4	Landscape photography
custom	Use specific width/height values

Custom Resolution

When using aspect_ratio: "custom", specify exact dimensions:

Parameter	Range	Description
Width	256-2048	Image width in pixels
Height	256-2048	Image height in pixels
Max Resolution	2MP	Total pixels limited to ~2 megapixels

Safety Controls

Level	Tolerance	Description
0	Strictest	Maximum content filtering
1	High	Strong safety measures
2	Medium	Balanced filtering (default)
3	Moderate	Relaxed filtering
4	Low	Minimal filtering
5	Minimal	Least restrictive

Advanced Features

Feature	Description
Custom Resolution	Precise width/height control up to 2MP
Safety Tolerance	Granular content filtering control
Prompt Upsampling	AI-enhanced prompt optimization
Image-to-Image	Transform existing images with text guidance
Professional Quality	State-of-the-art generation quality

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": "black-forest-labs/flux-1.1-pro",
"promptObject": {
  "prompt": "A majestic mountain landscape at golden hour with dramatic clouds",
  "aspect_ratio": "16:9",
  "output_quality": 90,
  "safety_tolerance": 2,
  "prompt_upsampling": true
}
}'

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: 'black-forest-labs/flux-1.1-pro',
  promptObject: {
    prompt: 'A majestic mountain landscape at golden hour with dramatic clouds',
    aspect_ratio: '16:9',
    output_quality: 90,
    safety_tolerance: 2,
    prompt_upsampling: true
  }
})
})

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": "black-forest-labs/flux-1.1-pro",
"promptObject": {
  "prompt": "A majestic mountain landscape at golden hour with dramatic clouds",
  "aspect_ratio": "16:9",
  "output_quality": 90,
  "safety_tolerance": 2,
  "prompt_upsampling": True
}
}

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

Interactive Playground

API Playground

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

AI Model *Flux Pro 1.1 - Black Forest Labs

Prompt *

Describe the image you want to generate

A majestic mountain landscape at golden hour with dramatic clouds

Image Prompt

Path to input image from Asset API for image-to-image generation

Aspect Ratio

Choose aspect ratio for your image

1:1 - Square16:9 - Widescreen9:16 - Vertical video3:2 - Photography2:3 - Portrait4:5 - Instagram5:4 - LandscapeCustom - Specify width/height

Width

Custom image width in pixels (when aspect_ratio is custom)

Height

Custom image height in pixels (when aspect_ratio is custom)

Output Quality

Output image quality (0-100)

Safety Tolerance

Safety filtering tolerance level (0-5, higher = less restrictive)

Prompt Upsampling

Enable automatic prompt enhancement

TrueFalse

Seed

Random seed for reproducibility (0-4294967295)

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": "black-forest-labs/flux-1.1-pro",
  "promptObject": {
    "prompt": "A majestic mountain landscape at golden hour with dramatic clouds",
    "aspect_ratio": "16:9",
    "output_quality": 90,
    "safety_tolerance": 2,
    "prompt_upsampling": true
  }
}'

Response Format

{
"aiRecord": {
  "uuid": "e4f5g6h7-i8j9-0123-4567-890123defghi",
  "userId": "user-12345",
  "teamId": "team-67890",
  "model": "black-forest-labs/flux-1.1-pro",
  "type": "IMAGE_GENERATOR",
  "status": "SUCCESS",
  "createdAt": "2025-01-15T10:50:00.000Z",
  "aiRecordDetail": {
    "promptObject": {
      "prompt": "A majestic mountain landscape at golden hour with dramatic clouds",
      "aspect_ratio": "16:9",
      "output_quality": 90,
      "safety_tolerance": 2,
      "prompt_upsampling": true
    },
    "resultObject": [
      "development/images/2025_01_15_10_50_45_001_mountain_landscape.webp"
    ]
  },
  "temporaryUrl": "https://s3.us-east-1.amazonaws.com/asset.1min.ai/development/images/2025_01_15_10_50_45_001_mountain_landscape.webp?X-Amz-Algorithm=AWS4-HMAC-SHA256&..."
}
}

Use Cases

• Professional Photography: High-end commercial imagery and artistic photography
• Marketing & Advertising: Premium visual content for campaigns and branding
• Fine Art Creation: Museum-quality digital art and creative expression
• Product Visualization: Detailed product renders and lifestyle imagery
• Custom Resolution Work: Precise sizing for specific design requirements

Tips for Best Results

1. Prompt Optimization:

   • Enable prompt upsampling for enhanced AI prompt interpretation
   • Use detailed, descriptive language for maximum quality
   • Include technical photography terms (aperture, lighting, composition)

2. Custom Resolution:

   • Use custom aspect ratio for precise sizing requirements
   • Stay within 2MP limit (e.g., 1600×1200, 2048×1024)
   • Consider final use case when choosing dimensions

3. Safety Tolerance:

   • Start with default level 2 for balanced filtering
   • Adjust based on content requirements and use case
   • Higher tolerance allows more creative freedom

4. Quality Settings:

   • Use 90-100 output quality for professional work
   • Lower quality (70-80) for web previews and iterations
   • Balance file size vs quality based on distribution needs

Notes

Premium Quality

Flux Pro 1.1 represents the pinnacle of AI image generation, offering unmatched quality and control for professional applications. The combination of custom resolution, safety tolerance, and prompt upsampling provides maximum creative flexibility.