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---
language:
- en
license: apache-2.0
tags:
- text-to-image
- image-generation
- flux
---
# FLUX.1 [schnell]
> **Note:** This repository is an **archived mirror** and is **not** the original upstream source.
> The original model, weights, and documentation are developed and maintained by **Black Forest Labs**.
>
> This mirror is provided solely for convenience and preservation purposes.
> The model weights hosted here are **unmodified**. Minor editorial changes may have been made to this README (e.g., formatting or clarification) and do **not** alter the model, its behavior, or its licensing.
>
> The model is released under the **Apache License, Version 2.0**, which permits use, reproduction, modification, and redistribution, including for commercial purposes, subject to the terms of the license.
>
> **Cooperation Notice:**
> If the original rights holder or upstream maintainers of this model request changes, clarification, or removal of this mirror, the repository maintainer is willing to cooperate in good faith.
>
> Any such requests can be raised via the **Discussions** section of this repository so they can be addressed transparently and appropriately.
`FLUX.1 [schnell]` is a 12-billion-parameter rectified flow transformer capable of generating high-quality images from text descriptions.
**Official Announcement:**
🔗 https://blackforestlabs.ai/announcing-black-forest-labs/
## Official Upstream Sources
- **FLUX.1-schnell — black-forest-labs (original Hugging Face model)**
https://huggingface.co/black-forest-labs/FLUX.1-schnell
# Key Features
1. Cutting-edge output quality and competitive prompt following, matching the performance of closed source alternatives.
2. Trained using latent adversarial diffusion distillation, `FLUX.1 [schnell]` can generate high-quality images in only 1 to 4 steps.
3. Released under the `apache-2.0` licence, the model can be used for personal, scientific, and commercial purposes.
## Usage
A full reference implementation of `FLUX.1 [schnell]`, including sampling code, is available in the official GitHub repository:
https://github.com/black-forest-labs/flux
Developers and creators should rely on the upstream GitHub repository when building applications, tools, or fine-tuning pipelines.
## ComfyUI
`FLUX.1 [schnell]` is also available in [Comfy UI](https://github.com/comfyanonymous/ComfyUI) for local inference with a node-based workflow.
## Diffusers
To use `FLUX.1 [schnell]` with the 🧨 diffusers python library, first install or upgrade diffusers
```shell
pip install -U diffusers
```
Then you can use `FluxPipeline` to run the model
```python
import torch
from diffusers import FluxPipeline
pipe = FluxPipeline.from_pretrained("black-forest-labs/FLUX.1-schnell", torch_dtype=torch.bfloat16)
pipe.enable_model_cpu_offload() #save some VRAM by offloading the model to CPU. Remove this if you have enough GPU power
prompt = "A cat holding a sign that says hello world"
image = pipe(
prompt,
guidance_scale=0.0,
num_inference_steps=4,
max_sequence_length=256,
generator=torch.Generator("cpu").manual_seed(0)
).images[0]
image.save("flux-schnell.png")
```
To learn more check out the [diffusers](https://huggingface.co/docs/diffusers/main/en/api/pipelines/flux) documentation
---
# Limitations
- This model is not intended or able to provide factual information.
- As a statistical model this checkpoint might amplify existing societal biases.
- The model may fail to generate output that matches the prompts.
- Prompt following is heavily influenced by the prompting-style.
# Out-of-Scope Use
The model and its derivatives may not be used
- In any way that violates any applicable national, federal, state, local or international law or regulation.
- For the purpose of exploiting, harming or attempting to exploit or harm minors in any way; including but not limited to the solicitation, creation, acquisition, or dissemination of child exploitative content.
- To generate or disseminate verifiably false information and/or content with the purpose of harming others.
- To generate or disseminate personal identifiable information that can be used to harm an individual.
- To harass, abuse, threaten, stalk, or bully individuals or groups of individuals.
- To create non-consensual nudity or illegal pornographic content.
- For fully automated decision making that adversely impacts an individual's legal rights or otherwise creates or modifies a binding, enforceable obligation.
- Generating or facilitating large-scale disinformation campaigns. |