What is Stable Diffusion?
Stable Diffusion is Stability AI's family of open source image generation models, the one that popularised generative AI. You can run it free on your own computer (with a decent GPU), fine-tune it with your own styles (LoRA), or use it from thousands of interfaces and services such as ComfyUI or the Stability APIs. Maximum freedom and control, with no censorship or subscriptions.
Pros
- Completely free when run on your own hardware
- Total control: fine-tunable models, LoRAs, ControlNet, no watermark
- Huge community ecosystem (ComfyUI, Automatic1111, CivitAI)
- No generation limits and no dependence on the cloud
Cons
- Running it locally requires a powerful GPU and technical know-how
- The best results require learning prompt engineering and workflows
- The most recent base models trail Midjourney or Flux on out-of-the-box quality
Frequently asked questions
Is Stable Diffusion free?
Yes, the models are open source and you can run them free on your computer. If you prefer the cloud, there are pay-as-you-go APIs and third-party sites.
What do I need to run it locally?
A GPU with at least 6-8 GB of VRAM (12+ is better) and an interface such as ComfyUI or Automatic1111. There are guides to install it in minutes.
Can I train my own styles?
Yes, that is its big advantage: you can fine-tune models or create LoRAs with your own images and styles, which is impossible on closed services.