Stable Diffusion is an open-source text-to-image AI model developed by Stability AI that generates high-quality images from text prompts. Released in 2022, it was the first major open-source image generation model, enabling anyone to run AI image generation locally on consumer hardware with an NVIDIA GPU. Its open weights allow fine-tuning, LoRA adapters, ControlNet, and custom models — creating a massive ecosystem of specialized models for anime, photorealism, product photography, and more through platforms like Civitai.
Stable Diffusion
Open-source AI image generation model.
Best for: AI artists and developers who want maximum control, customisation and the ability to run models locally.
- Free plan
4.6/5 ratingEditorial score 90/100stability.ai
Entry plan
Free (self-hosted)
Get started free
Opens the official website in a new tab.
Editorial score90/100
The editorial note
What to know about Stable Diffusion
Is it right for you?
Who Stable Diffusion suits
Choose it if
- AI artists and developers who want maximum control, customisation and the ability to run models locally.
Look elsewhere if
- Non-technical users or those without a powerful GPU — Midjourney or Leonardo.ai provide high-quality AI image generation through simple web interfaces without the technical setup Stable Diffusion requires
What you get
Key features
- Text-to-image generation
- Image-to-image transformation
- Inpainting and outpainting
- ControlNet for pose and composition
- LoRA fine-tuning support
- Local GPU inference
- Automatic1111 web UI
- ComfyUI node-based interface
Works with
Integrations8
Automatic1111ComfyUIInvokeAIFooocusNMKD Stable Diffusion GUIKrita pluginGIMP pluginComfyUI workflows
What it costs
Pricing
| Plan | Price | What it includes |
|---|---|---|
| Open Source | Free (self-hosted)Billed monthly | Run locally for free — open-source image generation model, no usage limits |
| DreamStudio (API) | From $0.04 / imageBilled monthly | Stability AI hosted API — pay per image generation via DreamStudio credits |
Prices are recorded from the vendor's public pricing page and can change. Check before you buy.
The trade-off
Pros and cons
Pros
- Completely free and open-source — run locally with no API costs or usage limits
- Massive ecosystem of community fine-tunes, LoRA adapters, and custom models on Civitai
- ControlNet enables precise control over pose, composition, and depth with reference images
- Full privacy — runs locally with no images sent to external servers
- Highly customizable through Automatic1111 and ComfyUI interfaces for advanced users
Cons
- Requires a powerful NVIDIA GPU (RTX 3060+) for practical generation speeds
- Complex setup and configuration — not beginner-friendly without UI tools like Automatic1111
- Default model quality without fine-tuning produces less photorealistic results than Midjourney
- Active model management (downloading models, LoRAs) requires technical knowledge and storage
Quick read
At a glance
- Category
- Design & Creative
- Pricing model
- Freemium
- Entry plan
- Free (self-hosted)
- Free plan
- Available
- Free trial
- Not listed
- Website
- stability.ai
The verdict
Our take on Stable Diffusion
The open-source AI image generation standard — technical users get unlimited customisation that closed models can't match.
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