Stable Diffusion 3 Introduction#

Stable Diffusion 3 is a milestone in open-source AI image generation, featuring the new MMDiT architecture.

Architecture Innovation#

SD3 adopts the revolutionary MMDiT (Multimodal Diffusion Transformer) architecture:

• Better text-image alignment
• Support for longer prompts
• Significantly improved image quality

Model Versions#

• SD3 Medium - 2B parameters, suitable for consumer GPUs
• SD3 Large - 8B parameters, higher quality output
• SD3 Large Turbo - Distilled version, 4-step generation

Open Source Advantages#

As an open-source model, SD3 supports:

• Local deployment and running
• Custom fine-tuning
• Extensions like LoRA, ControlNet
• Commercial use (some versions)