FLUX.1 Schnell

🚀 FLUX.1 [schnell]

FLUX.1 [schnell] is a 12-billion parameter rectified flow transformer that can generate images from text descriptions, offering high-quality output and strong prompt-following ability.

FLUX.1 [schnell] is a 12 billion parameter rectified flow transformer capable of generating images from text descriptions. For more information, please read our blog post.

✨ Features

1. Cutting-edge Quality: It delivers state-of-the-art output quality and competitive prompt following, matching the performance of closed-source alternatives.
2. Fast Generation: Trained using latent adversarial diffusion distillation, FLUX.1 [schnell] can generate high-quality images in just 1 to 4 steps.
3. Flexible Licensing: Released under the apache-2.0 license, the model can be used for personal, scientific, and commercial purposes.

🚀 Quick Start

We provide a reference implementation of FLUX.1 [schnell], as well as sampling code, in a dedicated github repository. Developers and creatives looking to build on top of FLUX.1 [schnell] are encouraged to use this as a starting point.

💻 Usage Examples

Basic Usage

To use FLUX.1 [schnell] with the 🧨 diffusers python library, first install or upgrade diffusers:

pip install -U diffusers

Then you can use FluxPipeline to run the model:

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 documentation.

📚 Documentation

API Endpoints

The FLUX.1 models are also available via API from the following sources:

• bfl.ml (currently FLUX.1 [pro])
• replicate.com
• fal.ai
• mystic.ai

ComfyUI

FLUX.1 [schnell] is also available in Comfy UI for local inference with a node-based workflow.

🔧 Technical Details

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.

📄 License

This project is released under the apache-2.0 license.