FLUX.1 Schnell

by Black Forest Labs

FLUX.1 Schnell is a 12B rectified-flow transformer for text-to-image, timestep-distilled to render high-quality images in just 1-4 steps. Released by Black Forest Labs under Apache 2.0 - the fully open, commercially usable member of the FLUX.1 family. Runs at guidance 1 with no negative prompt. The FP8 build is an all-in-one checkpoint (diffusion + text encoders + VAE bundled); BF16 and GGUF use separate components.

ImageApache 2.0Released Aug 202412B parameters

Hugging Face repo ↗Black Forest Labs ↗

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full qualitylightest

Lighter tiers fit smaller GPUs and lose some detail. Start with the heaviest one that loads.

The model

FLUX.1 Schnell

BF1631.8 GB

Three pieces, three separate downloads.

Diffusion modelGoes in diffusion_models/

Generates the image

22.1 GB↓↗

Text encoderGoes in text_encoders/

Turns your prompt into guidance

Pick one: smaller loads faster, larger keeps more detail.

9.1 GB↓↗

0.2 GB↓↗

VAEGoes in vae/

Decodes the result into pixels

0.3 GB↓↗

LoRAs (optional)Goes in loras/

No LoRAs indexed for this model.

SamplerKSampler

Copy these values into your KSampler.

Steps4

CFG1

Samplereuler

Schedulersimple

Native res.1024x1024 (native), up to ~2 MP

Usage notes

GGUF is the lightest way to run this model.

Apache 2.0. Check the official repo for usage terms.

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