Stable Diffusion API
The Playground - Stable Diffusion and Dreambooth API is a tool that allows users to play with stable diffusion models through an easy-to-us...
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What is Stable Diffusion API?
Stable Diffusion API is a REST API for generating images using Stable Diffusion and over 1,000+ community models. It handles all GPU infrastructure so developers can focus on building without needing their own GPUs or setup. The API provides one endpoint for Stable Diffusion 1.5, SDXL, Flux, ControlNet, LoRA fine-tunes, and thousands of community models including anime and photorealistic specialty models.
Key features include text-to-image (text2img), image-to-image (img2img), inpainting, super resolution, DreamBooth fine-tuning, webhook support for async processing, prompt enhancement, negative prompts, adjustable guidance scale, scheduler selection, and the ability to upload custom models. The playground offers an easy-to-use UI for testing models without coding. Images are delivered in PNG, JPG, and WebP formats with CDN delivery.
This tool is designed for developers building AI applications, fintech companies generating 50K+ images daily, e-commerce platforms handling 100K+ requests/day, AI content tool builders, and teams needing mission-critical image generation workloads. With 800M+ images generated and 100K+ developers using the service, it's suitable for both MVP development and production-scale applications.
Stable Diffusion API pricing
Pricing model: Paid
Free tier includes 20 image generations with no credit card required. Paid plans start at $8/month with unlimited access to all public models. Per-image pricing starts at $0.0047 for image generation. Subscription tiers include: Custom PAYG for MVP development (5 concurrent requests), Standard at $47/month for production (10 concurrent API requests), and Unlimited Premium at $199/month for mission-critical workloads (15 parallel generations, unlimited usage, access to all APIs). DreamBooth fine-tuning starts at $3 per model. Image generation pricing varies by model: Flux 2 Max text-to-image at $0.24 per generation, Flux Kontext Pro at $0.044 per generation.
Stable Diffusion API pros
- Free tier with 20 image generations
- No credit card required for free tier
- No GPU or setup needed
- Plug-and-play REST API
- Access to 2,871+ models
- Supports SD 1.5, SDXL, Flux, ControlNet, LoRA
- Transparent per-image pricing
- Images generated in 2-4 seconds
- 1000+ requests per minute throughput
- PNG, JPG, WebP output formats
- Webhook support for async completion
- Custom model upload capability
- Full commercial copyright on generated images
- 24x7 technical support available
- 99.9% uptime SLA guarantee
- Python, Node.js, Go, PHP SDKs
- Postman collection available
- Enhance prompt feature for better results
- Negative prompt for refining outputs
- Adjustable guidance scale (1-40)
- Scheduler/sampler selection options
- Batch processing up to 4 samples
- Base64 image upload support
- DreamBooth fine-tuning at $3 per model
Stable Diffusion API cons
- Maximum image size 1024x768 or 768x1024
- Rate limits depend on subscription tier
- Images deleted after 30 days on S3
- Free tier limited to only 20 generations
- DreamBooth training costs extra at $3/model
- You need own S3 bucket for some endpoints
- Inactive accounts deleted after extended inactivity
- Model loading takes up to 10 minutes first request
- Maximum 4 samples per request
- Concurrent request limits vary by plan
Frequently asked questions about Stable Diffusion API
What is Stable Diffusion API?
Stable Diffusion API is a REST API for generating images using Stable Diffusion and 1,000+ community models. It handles the GPU infrastructure so you can focus on building. The API provides one endpoint for Stable Diffusion 1.5, SDXL, Flux, ControlNet, LoRA, and 1,000+ community models with plug-and-play functionality, free tier, and transparent pricing.
Is Stable Diffusion API free?
Yes — the free tier includes 20 image generations with no credit card required. Paid plans start at $8/month with unlimited access to all public models. Pricing details are available on modelslab.com/pricing with per-image pricing starting at $0.0047.
How do I get a Stable Diffusion API key?
Sign up at modelslab.com since Stable Diffusion API is part of ModelsLab. Your API key is located in the dashboard under API Settings. Go to Dashboard → API Settings → View API Key. API key access is granted immediately after payment.
Can I use Stable Diffusion API commercially?
Yes — you retain full copyright on images you generate via the API and can use them commercially. All images you generate via the API have your copyright, and commercial use is explicitly permitted. The service uses public models and their own models.
What models can I use?
You can use Stable Diffusion 1.5, SDXL, Flux, ControlNet, LoRA fine-tunes, anime and photorealistic specialty models, and 1,000+ community uploads. The catalog includes 2,871+ models including Cyberreal, Realistic Vision V51/V60, Anything V3/V4/V5, Deliberate V2, and Pony Realism V21. You can also upload your own custom model.
Do I need a GPU?
No. The service runs on server-side GPUs hosted by ModelsLab. You only need an internet connection and an API key. This eliminates the need for expensive GPU hardware and setup time.
How do I use text-to-image in the playground?
Sign in to your account, go to the playground, select a model from the catalog, enter your prompt describing what you want to see, optionally add a negative prompt for items you don't want, adjust parameters like image height/width, guidance scale, and steps, then click generate. Results appear in seconds.
What is the price of DreamBooth model training?
DreamBooth fine-tuning starts at $3 per model. Subscription plans are available at $8, $49, and $149/month tiers depending on volume. You can upload local training images to cloud storage (S3, Cloudinary) and supply direct URLs in the training request.
Is there a rate limit on the regular plan?
Yes — rate limits depend on your subscription tier. Higher tiers have more concurrent requests and faster queue priority. Custom PAYG plan allows 5 concurrent API requests, Standard at $47/month allows 10 concurrent requests, and Unlimited Premium at $199/month allows 15 parallel generations.
How long are images stored?
All generated images are stored on a shared AWS S3 bucket for 30 days. After that they are automatically deleted unless you download them. For permanent storage, you should download images before the 30-day expiration or use your own S3 bucket for certain endpoints.