Model
Inference & Serving
FLUX.1
1Black 2Forest 3Labs' 4rectified-flow 5text-to-image 6model
the six Ws · specification
W1
Who
Black Forest Labs, founded by former Stable Diffusion creators, developed the FLUX.1 image model family.
W2
What
FLUX.1 is a 12B-parameter rectified-flow diffusion transformer for text-to-image generation, released in schnell, dev, and pro variants.
W3
Where
Weights for schnell and dev are hosted on Hugging Face, with inference code on GitHub.
W4
When
Released August 2024 by Black Forest Labs.
W5
Why
Built to push open and commercial text-to-image quality and prompt adherence beyond prior diffusion models.
W6
With
Runs via the black-forest-labs/flux GitHub repo, ComfyUI, or Diffusers with the released checkpoints.
W7
Watch
FLUX.1 schnell is Apache 2.0, dev is non-commercial only, pro and flex are proprietary API only; maintained by Black Forest Labs.