---
license: other
license_name: stabilityai-ai-community
license_link: LICENSE.md
tags:
- text-to-image
- stable-diffusion
- diffusers
inference: true
language:
- en
pipeline_tag: text-to-image
---

# Stable Diffusion 3.5 Large BF16
![3.5 Large Demo Image](sd3.5_large_demo.png)

## Model

![MMDiT](mmdit.png)


[Stable Diffusion 3.5 Large](https://stability.ai/news/introducing-stable-diffusion-3-5) is a Multimodal Diffusion Transformer (MMDiT) text-to-image model that features improved performance in image quality, typography, complex prompt understanding, and resource-efficiency.

Please note: This model is released under the [Stability Community License](https://stability.ai/community-license-agreement). Visit [Stability AI](https://stability.ai/license) to learn or [contact us](https://stability.ai/enterprise) for commercial licensing details.


### Model Description

- **Developed by:** Stability AI
- **Model type:** MMDiT text-to-image generative model
- **Model Description:** This model generates images based on text prompts. It is a [Multimodal Diffusion Transformer](https://arxiv.org/abs/2403.03206) that use three fixed, pretrained text encoders, and with QK-normalization to improve training stability. 

### License

- **Community License:**  Free for research, non-commercial, and commercial use for organizations or individuals with less than $1M in total annual revenue. More details can be found in the [Community License Agreement](https://stability.ai/community-license-agreement). Read more at https://stability.ai/license.
- **For individuals and organizations with annual revenue above $1M**: please [contact us](https://stability.ai/enterprise) to get an Enterprise License.

### Model Sources

For local or self-hosted use, we recommend [ComfyUI](https://github.com/comfyanonymous/ComfyUI) for node-based UI inference, or [diffusers](https://github.com/huggingface/diffusers) or [GitHub](https://github.com/Stability-AI/sd3.5) for programmatic use.

- **ComfyUI:** [Github](https://github.com/comfyanonymous/ComfyUI), [Example Workflow](https://comfyanonymous.github.io/ComfyUI_examples/sd3/)
- **Huggingface Space:** [Space](https://huggingface.co/spaces/stabilityai/stable-diffusion-3.5-large)
- **Diffusers**: [See below](#using-with-diffusers).
- **GitHub**: [GitHub](https://github.com/Stability-AI/sd3.5).

- **API Endpoints:**
  - [Stability AI API](https://platform.stability.ai/docs/api-reference#tag/Generate/paths/~1v2beta~1stable-image~1generate~1sd3/post)
  - [Replicate](https://replicate.com/stability-ai/stable-diffusion-3.5-large)
  - [Deepinfra](https://deepinfra.com/stabilityai/sd3.5)


### Implementation Details

- **QK Normalization:** Implements the QK normalization technique to improve training Stability.

- **Text Encoders：**
    - CLIPs: [OpenCLIP-ViT/G](https://github.com/mlfoundations/open_clip), [CLIP-ViT/L](https://github.com/openai/CLIP/tree/main), context length 77 tokens
    - T5: [T5-xxl](https://huggingface.co/google/t5-v1_1-xxl), context length 77/256 tokens at different stages of training

- **Training Data and Strategy:**
    
    This model was trained on a wide variety of data, including synthetic data and filtered publicly available data. 

For more technical details of the original MMDiT architecture, please refer to the [Research paper](https://stability.ai/news/stable-diffusion-3-research-paper).


### Model Performance

See [blog](https://stability.ai/news/introducing-stable-diffusion-3-5) for our study about comparative performance in prompt adherence and aesthetic quality. 

## Using with Diffusers
Upgrade to the latest version of the [🧨 diffusers library](https://github.com/huggingface/diffusers)
```
pip install -U diffusers
```

and then you can run
```py
import torch
from diffusers import StableDiffusion3Pipeline

pipe = StableDiffusion3Pipeline.from_pretrained("stabilityai/stable-diffusion-3.5-large", torch_dtype=torch.bfloat16)
pipe = pipe.to("cuda")

image = pipe(
    "A capybara holding a sign that reads Hello World",
    num_inference_steps=28,
    guidance_scale=3.5,
).images[0]
image.save("capybara.png")
```

### Contact

Please report any issues with the model or contact us:

* Safety issues:  safety@stability.ai
* Security issues:  security@stability.ai
* Privacy issues:  privacy@stability.ai
* License and general: https://stability.ai/license
* Enterprise license: https://stability.ai/enterprise