Stable Diffusion

Stable Diffusion is the leading open-source AI image generation model, runnable entirely on your own hardware via tools like ComfyUI, AUTOMATIC1111, and InvokeAI. Free if you have a capable GPU (8GB+ VRAM recommended). The ecosystem includes thousands of community models on Civitai, LoRAs for style/character control, ControlNet for compositional control, and the latest FLUX models for state-of-the-art photorealism. Best for: power users wanting full control, privacy-conscious workflows, unlimited generation without subscriptions, fine-tuning custom models, and production work requiring features like inpainting and ControlNet.