Stable Diffusion 3 Medium (SD3 Medium) - A resource-efficient text-to-image AI model by Stability AI, optimized for consumer-grade hardware.

## Model Architecture **Stable Diffusion 3 Medium (SD3 Medium)** uses a **Multimodal Diffusion Transformer (MMDiT)** architecture. It incorporates three text encoders (OpenCLIP-ViT/G, CLIP-ViT/L, and T5-xxl) for prompt processing and a 16-channel VAE for enhanced image detail, particularly in hands and faces. ## Hardware Specifications The model requires **8GB–16GB of VRAM** on consumer-grade GPUs. Optimized versions (e.g., TensorRT) reduce resource usage. AMD GPUs are also supported through dedicated optimizations for APUs and enterprise hardware like the MI-300X. ## Text Generation Capabilities SD3 Medium significantly improves **text rendering quality**, minimizing spelling, spacing, and letter-formation errors. This makes it suitable for scenarios requiring embedded text, such as posters or educational materials. ## Training Data The model was **pre-trained on 1 billion images** and **fine-tuned** with: - 30 million high-aesthetic images - 3 million preference-based images This ensures nuanced style adaptation and prompt fidelity. ## Known Limitations While excelling in **hand/facial generation**, SD3 Medium may produce suboptimal **animal leg depictions**. Users should verify outputs for such edge cases. It is also not designed for photorealistic representations of real people/events per Stability AI’s [Acceptable Use Policy](https://stability.ai/use-policy). ## Access Methods - **Local execution**: Via tools like [ComfyUI](https://github.com/comfyanonymous/ComfyUI) using weights from [Hugging Face](https://huggingface.co/stabilityai/stable-diffusion-3-medium). - **API**: Through [Stability AI’s platform](https://platform.stability.ai) or partners like Fireworks AI. - **Web platforms**: Free trials on [Stable Assistant](https://stability.ai/stable-assistant) or Discord’s Stable Artisan. - **Baidu Pan link**: User-shared resources (password: `gsfy`) may include workflow templates. ## Licensing Terms for Stable Diffusion 3.5 SD3 Medium is released under the **Stability Community License**, permitting research, non-commercial, and small-scale commercial use (annual revenue <$1M). Enterprise users must contact [Stability AI](https://stability.ai/enterprise). Full terms are on [Hugging Face](https://huggingface.co/stabilityai/stable-diffusion-3-medium). ## Model Variants Comparison | Parameter | SD3 Medium | SD3 Large/Ultra | |-----------------|------------|-----------------| | **Size** | 2B params | Larger (exact specs undisclosed) | | **VRAM** | 8GB–16GB | Higher | | **Optimization**| TensorRT/AMD support | Likely similar | | **Access** | Community License | May require enterprise plans | ### Citation sources: - [Stable Diffusion 3 Medium (SD3 Medium)](https://huggingface.co/stabilityai/stable-diffusion-3-medium) - Official URL Updated: 2025-04-01