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AI Image Generation API for Developers

Integrate AI image generation into your application with ModelsLab's image generation API. Access Stable Diffusion, Flux, SDXL, and 10,000+ models through a single REST endpoint.

Get Image Generation API KeyAPI Documentation

What is ModelsLab's AI Image Generation API?

Enterprise-Grade AI Image Generation API

ModelsLab provides the most comprehensive AI image generation API available, giving developers access to over 10,000 AI models through a single REST endpoint. The API supports Stable Diffusion (SDXL, SD 1.5, SD 3.0), Flux, DALL-E compatible models, and thousands of community fine-tuned variants — all without managing GPU infrastructure.

Unlike closed APIs from OpenAI or Leonardo AI that limit you to a single model, ModelsLab lets you switch between any model with a single parameter change. Run photorealistic SDXL for product photos, anime-optimized models for illustrations, or your own DreamBooth-trained models for branded content — all through the same API endpoint.

ModelsLab processes millions of image generations monthly for over 50,000 developers worldwide. The platform handles model loading, GPU allocation, auto-scaling, and failover automatically, so you can focus on building your application instead of managing AI infrastructure.

Supported Image Generation Capabilities

The ModelsLab AI image generation API supports a comprehensive set of image creation and editing workflows:

  • Text-to-Image — Generate images from natural language prompts with full control over style, composition, resolution, and artistic direction
  • Image-to-Image — Transform existing images with AI-guided modifications, style transfers, and compositional changes
  • Inpainting — Edit specific regions of images by masking areas and providing text prompts for AI-powered replacement
  • Outpainting — Extend image boundaries to create wider or taller compositions while maintaining visual coherence
  • ControlNet — Guide generation with reference images for pose, depth, edge, and composition control
  • Upscaling — Enhance image resolution up to 8K using Real-ESRGAN and other super-resolution models
  • Background Removal — Remove and replace backgrounds from product photos and portraits using AI segmentation
  • Face Swap — Replace faces in images while preserving lighting, angle, and expression matching

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Google logo
Salesforce logo
Amazon logo
IBM logo
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Sony logo
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1B+

Images Processed Monthly

500K+

Active Developers

5K+

Discord Community Members

300+

Available AI APIs

AI Image Generation API Quick Start

Start generating images in seconds with simple REST API calls.

Generate an image with Python

Python
import requests

url = "https://modelslab.com/api/v7/images/text-to-image"
payload = {
    "key": "YOUR_API_KEY",
    "model_id": "flux",
    "prompt": "professional product photography of a sneaker, studio lighting, white background",
    "negative_prompt": "blurry, distorted, low quality",
    "width": 1024,
    "height": 1024,
    "samples": 4,
    "num_inference_steps": 25,
    "guidance_scale": 7.5
}

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

# data["output"] contains a list of generated image URLs
for i, url in enumerate(data["output"]):
    print(f"Image {i+1}: {url}")

Image-to-Image transformation

Python
import requests

url = "https://modelslab.com/api/v7/images/image-to-image"
payload = {
    "key": "YOUR_API_KEY",
    "model_id": "sdxl",
    "init_image": "https://example.com/input-image.jpg",
    "prompt": "transform into watercolor painting style",
    "strength": 0.7,
    "guidance_scale": 7.5,
    "samples": 1
}

response = requests.post(url, json=payload)
data = response.json()
print(data["output"][0])  # Transformed image URL

Generate with JavaScript (Node.js)

JavaScript
const response = await fetch('https://modelslab.com/api/v7/images/text-to-image', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    key: 'YOUR_API_KEY',
    model_id: 'flux',
    prompt: 'professional product photography of a sneaker, studio lighting',
    width: 1024,
    height: 1024,
    samples: 4
  })
});

const data = await response.json();
// data.output = array of generated image URLs
data.output.forEach((url, i) => console.log(`Image ${i+1}: ${url}`));

One API, 10,000+ Image Generation Models

Access the largest collection of AI image models through a single API. Generate, edit, transform, and upscale images at enterprise scale.

Text-to-Image Generation

Generate images from text prompts using Stable Diffusion, Flux, SDXL, and thousands of community-trained models. Control style, composition, and detail through natural language descriptions.

Image-to-Image Transformation

Transform existing images with AI. Apply style transfers, modify compositions, change artistic styles, and enhance details while preserving the original structure and layout.

Inpainting and Editing

Edit specific regions of an image using AI. Remove objects, replace backgrounds, fill missing areas, and make targeted edits with mask-based inpainting through API calls.

Upscaling and Enhancement

Upscale images to 4K and 8K resolution without quality loss. Enhance details, reduce noise, and sharpen images with AI-powered super-resolution models.

Text-to-Image Generation
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Everything developers need to build image-powered applications.

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AI Image Generation API Comparison

How ModelsLab compares to other AI image generation API providers.

FeatureModelsLabOpenAI (DALL-E)Leonardo AIxAI (Grok)
Models Available10,000+1 (DALL-E 3)~501 (Grok)
Open Source Models✅ Yes❌ No✅ Limited❌ No
Custom Model Training✅ DreamBooth❌ No✅ Yes❌ No
ControlNet✅ Full Suite❌ No✅ Limited❌ No
Image-to-Image✅ Yes✅ Yes✅ Yes❌ No
Inpainting✅ Yes✅ Yes✅ Yes❌ No
Starting Price$0.002/image$0.040/image$0.004/imageIncluded
Unlimited Plan✅ $29/mo❌ No✅ $48/mo✅ $25/mo
Parallel GenerationUp to 151Up to 81
NSFW Content✅ Allowed❌ No❌ No❌ No
Self-Hosted Option✅ Enterprise❌ No❌ No❌ No

Data as of February 2026. Pricing based on publicly available information.

How to Use the AI Image Generation API

Generate your first AI image in under 5 minutes.

STEP 01
STEP 01

Step 1: Get Your API Key

Create a free ModelsLab account and generate your API key. No credit card required — the free tier includes image generation credits to get started.

STEP 02
STEP 02

Step 2: Choose a Model and Prompt

Select from Stable Diffusion, Flux, SDXL, or any community model. Send a POST request with your text prompt, model ID, and generation parameters like resolution and seed.

STEP 03
STEP 03

Step 3: Get Your Images

Receive generated images as URLs or base64 data within 2-5 seconds. Download them directly or serve to your users. Generate up to 15 images per request.

Start Generating Images

AI Image Generation API Pricing

ModelsLab offers the most competitive pricing for AI image generation APIs. Pay-as-you-go pricing starts at $0.002 per image — up to 20x cheaper than OpenAI DALL-E 3. For high-volume users, the unlimited plan at $29 per month provides unrestricted access to all image generation models including SDXL, Flux, and community models.

All plans include a free tier with 100 API calls per day, making it easy to evaluate the API before committing. Enterprise plans with dedicated GPU instances, custom SLAs, and priority support start at $299 per month.

API Response Format

The ModelsLab AI image generation API returns a consistent JSON response for all endpoints. Generated images are returned as publicly accessible URLs that remain available for 24 hours, or as base64-encoded data for direct embedding. The API supports synchronous and asynchronous generation modes — for synchronous requests, images are returned in the response; for asynchronous requests, use the fetch endpoint with the returned request_id to retrieve completed images.

Integration and SDKs

ModelsLab provides official SDKs and integration guides for popular languages and frameworks:

  • Python SDK — pip install modelslab — Full API coverage with async support and type hints
  • JavaScript/TypeScript — npm install modelslab — Works with Node.js, Deno, and browser environments
  • REST API — Standard HTTP endpoints compatible with any language (cURL, Ruby, Go, Java, PHP, etc.)
  • Webhook Callbacks — Receive completion notifications via HTTP webhooks for async processing pipelines
  • Postman Collection — Pre-built API collection for interactive testing and exploration

Why ModelsLab for AI Image Generation?

Key advantages that set us apart

10,000+ models — Stable Diffusion, Flux, SDXL, and community models
Text-to-image, image-to-image, and inpainting endpoints
ControlNet for precise pose, depth, and edge guidance
LoRA support for style fine-tuning and customization
Up to 15 parallel generations per request
Upscale images to 8K resolution
Negative prompts and seed control for reproducibility
Transparent per-image pricing — no hidden costs
Sub-3-second generation times on dedicated GPUs
GDPR-compliant with no image data retention
Python, JavaScript, and cURL examples in documentation
99.9% uptime SLA for enterprise plans
24/7 developer support via Discord and email
No questions asked refund policy

Our Popular Use Cases

What developers build with our image generation API:

Generate product photography, lifestyle shots, and marketing visuals at scale. Create consistent product images without expensive studio sessions.

E-Commerce Product Photos

AI Image Generation API FAQ

An AI image generation API is a REST API that allows developers to programmatically create images from text descriptions (prompts) using artificial intelligence models like Stable Diffusion, SDXL, and Flux. ModelsLab provides an AI image generation API with access to over 10,000 models, supporting text-to-image, image-to-image, inpainting, ControlNet, and upscaling workflows.

ModelsLab AI image generation API pricing starts at $0.002 per image, making it one of the most affordable options available — up to 20x cheaper than OpenAI DALL-E. An unlimited plan is available at $29/month. Enterprise plans with dedicated GPUs start at $299/month. All plans include a free tier with 100 API calls per day.

ModelsLab supports over 10,000 AI image generation models including Stable Diffusion XL (SDXL), Stable Diffusion 1.5, Stable Diffusion 3.0, Flux, and thousands of community fine-tuned models from CivitAI. You can also train and deploy custom models using DreamBooth.

ModelsLab offers 10,000+ models vs DALL-E's single model, prices starting at $0.002/image vs $0.040/image, ControlNet and LoRA support, custom model training, NSFW content support, and up to 15 parallel generations. DALL-E excels in single-model quality but ModelsLab offers far more flexibility and lower cost.

Yes, ModelsLab supports custom model training via DreamBooth. Upload 10-20 training images, fine-tune a Stable Diffusion model on your specific style or subject, and deploy it to the API within minutes. Custom models are accessible through the same API endpoints as all other models.

Yes, all images generated through the ModelsLab API can be used commercially. The platform uses open-source models with permissive licenses (CreativeML Open RAIL-M). Enterprise customers receive additional commercial guarantees and indemnification options.

The API supports image generation from 256×256 up to 2048×2048 natively, with upscaling to 8K resolution available via the upscale endpoint. SDXL models natively generate at 1024×1024 for optimal quality. Custom aspect ratios are supported across all models.

Average generation time is 2-5 seconds depending on the model and resolution. SDXL generates in ~2.5 seconds, SD 1.5 in ~1.5 seconds, and Flux in ~3 seconds on dedicated A100 GPUs. The API supports batch generation of up to 15 images per request for parallel processing.

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GDPR Compliant

Flexible Pricing for Your AI Design & Visualization Needs

Choose the plan that fits your creative or development workflow. Cancel anytime.

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We are making some changes to our pricing, please check back later.

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Want to know more? You can email us anytime at support@modelslab.com

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