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README.md
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---
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language:
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- en
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license: apache-2.0
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library_name: diffusers
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pipeline_tag: text-to-image
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tags:
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- text-to-image
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- image-generation
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- shuttle
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---
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# Shuttle 3 Diffusion
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## Model Variants
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These model variants provide different precision levels and formats optimized for diverse hardware capabilities and use cases
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- [bfloat16](https://huggingface.co/shuttleai/shuttle-3-diffusion)
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- [GGUF](https://huggingface.co/shuttleai/shuttle-3-diffusion-GGUF)
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- [fp8](https://huggingface.co/shuttleai/shuttle-3-diffusion-fp8)
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Shuttle 3 Diffusion is a text-to-image AI model designed to create detailed and diverse images from textual prompts in just 4 steps. It offers enhanced performance in image quality, typography, understanding complex prompts, and resource efficiency.
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You can try out the model through a website at https://chat.shuttleai.com/images
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## Using the model via API
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You can use Shuttle 3 Diffusion via API through ShuttleAI
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- [ShuttleAI](https://shuttleai.com/)
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- [ShuttleAI Docs](https://docs.shuttleai.com/)
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## Using the model with 🧨 Diffusers
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Install or upgrade diffusers
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```shell
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pip install -U diffusers
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```
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Then you can use `DiffusionPipeline` to run the model
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```python
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import torch
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from diffusers import DiffusionPipeline
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# Load the diffusion pipeline from a pretrained model, using bfloat16 for tensor types.
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pipe = DiffusionPipeline.from_pretrained(
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"shuttleai/shuttle-3-diffusion", torch_dtype=torch.bfloat16
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).to("cuda")
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# Uncomment the following line to save VRAM by offloading the model to CPU if needed.
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# pipe.enable_model_cpu_offload()
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# Uncomment the lines below to enable torch.compile for potential performance boosts on compatible GPUs.
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# Note that this can increase loading times considerably.
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# pipe.transformer.to(memory_format=torch.channels_last)
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# pipe.transformer = torch.compile(
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# pipe.transformer, mode="max-autotune", fullgraph=True
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# )
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# Set your prompt for image generation.
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prompt = "A cat holding a sign that says hello world"
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# Generate the image using the diffusion pipeline.
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image = pipe(
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prompt,
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height=1024,
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width=1024,
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guidance_scale=3.5,
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num_inference_steps=4,
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max_sequence_length=256,
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# Uncomment the line below to use a manual seed for reproducible results.
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# generator=torch.Generator("cpu").manual_seed(0)
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).images[0]
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# Save the generated image.
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image.save("shuttle.png")
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```
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To learn more check out the [diffusers](https://huggingface.co/docs/diffusers/main/en/api/pipelines/flux) documentation
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## Using the model with ComfyUI
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To run local inference with Shuttle 3 Diffusion using [ComfyUI](https://github.com/comfyanonymous/ComfyUI), you can use this [safetensors file](https://huggingface.co/shuttleai/shuttle-3-diffusion/blob/main/shuttle-3-diffusion.safetensors).
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## Comparison to other models
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Shuttle 3 Diffusion can produce images better images than Flux Dev in just four steps, while being licensed under Apache 2.
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[More examples](https://docs.shuttleai.com/getting-started/shuttle-diffusion)
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## Training Details
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Shuttle 3 Diffusion uses Flux.1 Schnell as its base. It can produce images similar to Flux Dev or Pro in just 4 steps, and it is licensed under Apache 2. The model was partially de-distilled during training. When used beyond 10 steps, it enters "refiner mode," enhancing image details without altering the composition. We overcame the limitations of the Schnell-series models by employing a special training method, resulting in improved details and colors.
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