Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.

3recommend
2warn against
Jan 16, 2026first mention
Oct 17, 2026latest mention
Nov 25 – Oct 26

Why people recommend it

“An Arc B580 will just about fit Flux.2 Klein (At FP8).”

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Caveats and dissent

“The example image for that upsampler shows a man holding a leash with all six of his fingers.”

Often compared with

All comments 8

“The example image for that upsampler shows a man holding a leash with all six of his fingers.”

did you try with https://huggingface.co/black-forest-labs/flux-3-image-klein-pup apparently the model is not going to work well unless this type of "prompt upsampler" is added

“like they did with Flux.2 / Klein”

NB2 means "Nano Banana 2", a Google image generation model. https://blog.google/innovation-and-ai/technology/ai/nano-banana-2/

“An Arc B580 will just about fit Flux.2 Klein (At FP8).”

“the original FLUX.2 [klein] model [1] and python code was only released about 3 days ago”

Threads where it came up

Also written as FLUX 3 Image Klein, FLUX.2 Klein, FLUX.2 [klein]. Data: flux-klein.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.

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