Flux Krea Dev - Image Generator

Balanced AI image generation model by Black Forest Labs. Flux Krea Dev offers an optimal balance between quality and speed with image-to-image capabilities, guidance control, and professional-grade output suitable for development and creative workflows.

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-krea-dev
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
prompt_strength	number	No	Influence of prompt vs input image (0-1)	0.8
num_inference_steps	number	No	Number of inference steps (1-50)	28
guidance	number	No	Guidance scale for prompt adherence (0-50)	3.5
seed	number	No	Random seed for reproducibility (0-4294967295)	Random
output_quality	number	No	Output image quality (0-100)	80
disable_safety_checker	boolean	No	Disable built-in safety filtering	false
go_fast	boolean	No	Enable fastest generation mode	false
megapixels	string	No	Output resolution in megapixels (0.25, 1)	1

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

Image-to-Image Features

Feature	Description
Image Upload	Use existing image as starting point
Prompt Strength	Control balance between prompt and input image
Style Transfer	Apply new styles to existing images

Quality Settings

Setting	Range	Description
Inference Steps	1-50	More steps = higher quality but longer generation time
Guidance	0-50	How closely to follow the prompt (higher = more adherence)
Prompt Strength	0-1	For img2img: strength of prompt vs input image
Megapixels	0.25, 1	Output resolution (0.25 = ~512×512, 1 = ~1024×1024, 2 = ~1448×1024)

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-krea-dev",
"promptObject": {
  "prompt": "Professional architectural photography, modern building design",
  "aspect_ratio": "1:1",
  "num_inference_steps": 28,
  "guidance": 3.5,
  "megapixels": "1",
  "output_quality": 80
}
}'

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-krea-dev',
  promptObject: {
    prompt: 'Professional architectural photography, modern building design',
    aspect_ratio: '1:1',
    num_inference_steps: 28,
    guidance: 3.5,
    megapixels: '1',
    output_quality: 80
  }
})
})

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-krea-dev",
"promptObject": {
  "prompt": "Professional architectural photography, modern building design",
  "aspect_ratio": "1:1",
  "num_inference_steps": 28,
  "guidance": 3.5,
  "megapixels": "1",
  "output_quality": 80
}
}

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

Interactive Playground

API Playground

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

AI Model *Flux Krea Dev - Black Forest Labs

Prompt *

Describe the image you want to generate

Professional architectural photography, modern building design

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 - Landscape

Prompt Strength

Influence of prompt vs input image (0-1)

Num Inference Steps

Number of inference steps (1-50)

Guidance

Guidance scale for prompt adherence (0-50)

Megapixels

Output resolution in megapixels

0.25 MP (~512×512)1 MP (~1024×1024)

Go Fast

Enable fastest generation mode

TrueFalse

Disable Safety Checker

Disable built-in safety filtering

TrueFalse

Output Quality

Output image quality (0-100)

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-krea-dev",
  "promptObject": {
    "prompt": "Professional architectural photography, modern building design",
    "aspect_ratio": "1:1",
    "prompt_strength": 0.8,
    "num_inference_steps": 28,
    "guidance": 3.5,
    "megapixels": "1",
    "output_quality": 80
  }
}'

Response Format

{
"aiRecord": {
  "uuid": "762c8e07-caf1-4691-aeb4-5bdb308f06dc",
  "userId": "c937fbcc-fa8f-4565-a440-c4d87f56fcb2",
  "teamId": "a4e176b2-dabb-451e-9c58-62b451fa9630",
  "teamUser": {
    "teamId": "a4e176b2-dabb-451e-9c58-62b451fa9630",
    "userId": "c937fbcc-fa8f-4565-a440-c4d87f56fcb2",
    "userName": "John Doe",
    "userAvatar": "https://lh3.googleusercontent.com/a/ACg8ocLqgsNsHRfmWF9d-E1RvJetVsEzxNOsOg-NXWNTpMxLDPJbwELI=s96-c",
    "status": "ACTIVE",
    "role": "ADMIN",
    "creditLimit": 100000000,
    "usedCredit": 2528205,
    "createdAt": "2025-10-20T04:13:40.847Z",
    "createdBy": "SYSTEM",
    "updatedAt": "2025-10-24T08:20:34.497Z",
    "updatedBy": "SYSTEM"
  },
  "model": "black-forest-labs/flux-krea-dev",
  "type": "IMAGE_GENERATOR",
  "metadata": null,
  "rating": null,
  "feedback": null,
  "conversationId": null,
  "status": "SUCCESS",
  "createdAt": "2025-10-24T08:31:25.704Z",
  "aiRecordDetail": {
    "promptObject": {
      "prompt": "Professional architectural photography, modern building design",
      "guidance": 3.5,
      "megapixels": "0.25",
      "aspect_ratio": "1:1",
      "output_quality": 80,
      "prompt_strength": 0.8,
      "num_inference_steps": 28
    },
    "resultObject": [
      "development/images/2025_10_24_15_31_27_956_110757.undefined"
    ],
    "responseObject": {}
  },
  "additionalData": null,
  "temporaryUrl": "https://s3.us-east-1.amazonaws.com/asset.1min.ai/development/images/2025_10_24_15_31_27_956_110757.undefined?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIAVRUVQEFIHSKAXGE7%2F20251024%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20251024T083129Z&X-Amz-Expires=604800&X-Amz-Signature=63cbed41b1d2c2fbf04a969a10429504c040ca267523724df8fef9f0da45fb8e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject"
}
}

Use Cases

• Development Workflows: Balanced quality and speed for iterative design
• Image-to-Image Generation: Transform existing images with new prompts
• Creative Projects: Professional quality for art, design, and marketing
• Prototyping: Quick high-quality concepts and mockups
• Style Transfer: Apply artistic styles to photographs

Tips for Best Results

1. Quality vs Speed Balance:

   • Use 28 steps for optimal quality-to-speed ratio
   • 15-20 steps for faster iterations
   • 35-50 steps for maximum quality

2. Image-to-Image Usage:

   • Use prompt strength 0.6-0.8 for balanced transformation
   • Lower values (0.3-0.5) preserve more of original image
   • Higher values (0.8-1.0) allow more dramatic changes

3. Guidance Settings:

   • Guidance 3.5 for balanced results
   • Lower guidance (1-3) for more creative freedom
   • Higher guidance (4-7) for stricter prompt adherence

Notes

Image-to-Image Capability

This model supports image-to-image generation. Upload an image via the Asset API and use the path in the image parameter to transform existing images.