FLUX.1 Redux

Over Black Forest Labs

Opgericht 2024 · Freiburg, Germany

Black Forest Labs was founded in August 2024 in Freiburg, Germany by Robin Rombach, Patrick Esser, Andreas Blattmann and Dominik Lorenz, the original Stable Diffusion team. After raising a $31M seed round led by Andreessen Horowitz, the lab released the FLUX.1 family (pro, dev, schnell) and the FLUX.1 Tools (Fill, Canny, Depth, Redux). Their mission is to be the leading European open foundation-model lab for generative media.

Architectuur

Rectified-flow DiT with image-embedding (Redux) conditioning for variation

FLUX.1 Redux is the image-to-image variation model in the FLUX.1 Tools suite. Rather than ControlNet-style structural conditioning, Redux uses an image encoder (a SigLIP-style vision transformer) to extract a dense embedding of the input image, which is then injected into the FLUX.1 DiT alongside the text embeddings via cross-attention. This is conceptually similar to IP-Adapter and Stable Diffusion's 'unCLIP': the result is a new image that captures the style, palette and high-level composition of the input but is regenerated from noise, producing diverse variations. Optionally a text prompt can steer the variation toward a different style or composition. The base backbone is the standard FLUX.1 rectified-flow DiT with T5-XXL and CLIP-L text encoders and a 16x VAE, sampled in 28-50 flow-matching steps.

Parameters

~12B (FLUX.1 dev backbone) plus image-encoder adapter

Context

512 tokens

Mogelijkheden

• Image-to-image variation conditioned on a reference image
• Optional text prompt to steer style or content of variations
• Preserves overall composition and palette while regenerating details
• Up to 2 MP output
• Compatible with FLUX Tools Fill/Canny/Depth pipelines
• Good for unCLIP-style 'more like this' workflows
• Best for: design exploration, A/B variants, mood-board expansion, style-transfer-lite.

Training & licentie

Fine-tuned from FLUX.1 base weights using paired references and image-text data, with a SigLIP-style image encoder trained or adapted to produce conditioning embeddings.

Licentie: FLUX.1 Redux [dev] under the FLUX.1 [dev] non-commercial license; FLUX.1 Redux [pro] via API for commercial use.

Veiligheidstests: Inherits FLUX.1 family safety filters; additional checks for NCII and IP-protected reference images.