Guides
How to run FLUX 3 Klein, what it needs and what it costs, from the vendors’ own documentation.
FLUX 3 Klein timeline and changelog
FLUX 3 Klein dates: the Hugging Face repository on October 13, 2026 and the release on October 15. Klein Studio changes from October 16, 2026 onward.
How to run FLUX 3 Klein in ComfyUI
How to run FLUX 3 Klein in ComfyUI: get the gated weights, follow ComfyUI’s tutorial, the 8 GB INT8 version and the prompt upsampler. Or try it in the browser.
Download FLUX 3 Klein weights
Where to download FLUX 3 Klein: the gated Black Forest Labs repository on Hugging Face. Accept the license, avoid mirrors, and what else a local setup needs.
FLUX 3 Klein questions and answers
Short answers about FLUX 3 Klein: who made it, when it came out, open weights and license, GPU and Mac, API prices, and how this site relates to BFL.
FLUX 3 Klein API and prices compared
FLUX 3 Klein API prices per image: BFL charges $0.008 to $0.036 by size, fal.ai lists the same as planned, Replicate bills by run time. How the BFL call works.
FLUX 3 Klein prompt gallery
Prompt ideas for FLUX 3 Klein: product photos, posters with text, landscapes, illustrations and edits. Each one opens the generator with the prompt filled in.
FLUX 3 Klein license explained
The FLUX Kommunity License v1.0 behind FLUX 3 Klein, per the model card: non-commercial use, commercial use under US$5M revenue, API terms and trademarks.
FLUX 3 Klein on a Mac
We found no Black Forest Labs statement on Apple Silicon support as of October 16, 2026. How to use FLUX 3 Klein on a Mac: browser, API or a rented GPU.
FLUX 3 Klein VRAM and hardware requirements
FLUX 3 Klein hardware needs from the vendors: an RTX 3090 minimum per Black Forest Labs, 8 GB of VRAM for ComfyUI’s INT8 version. What to do with less.
FLUX 3 Klein vs FLUX.2 Klein
FLUX 3 Klein compared with FLUX.2 Klein: the verified FLUX 3 Klein specs (5.6B, 4K, editing, license, prices) and a checklist for comparing it with FLUX.2.