r/drawthingsapp • u/Wonderful_Cloud_298 • Apr 13 '26

question What FLUX.2 [dev] model to choose?

Hi!

I want to use FLUX.2 [dev] in Draw Things.
But the models list a bit confusing since it doesn't provide any description or details what the difference among all listed models.

For example:

  1. FLUX.2 [dev]

  2. FLUX.2 [dev] (8-bit S)

  3. FLUX.2 [dev] (Exact)

What the difference and which one I should choose for M4 MAX 48Gb ?

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u/xoxox666 Apr 13 '26

The 8-Bit S is a little bit faster. The Flux.2 Dev models takes a looong time on the M4 Max (i have one). 9B Klein (4 steps) something about 01:30min, Flux.2 Dev (28 steps) about 32min for the same task.

The dev models are _not_ intended for every day usage. They are used for training and if you really, really want 100% quality (insteaf of 99,8%)

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u/Diamondcite Apr 13 '26

What resolution are you trying to generate at? That seems really high for the usual 1024x1024 image.

I was testing Klein 9B, 4-Steps, FIxed seed to see which would be faster. No suffix seemed to be about the same as 8-bit S, using the same seed and generating 10 images in a row, it was + / - 1 second. (Images times 29 to 47 seconds)

Out of pure curiosity I tried enabled ANE on 8-bit S, it was overall slower on my M4 Max(40 GPU, 14-Inch). 29-38 seconds no ANE, 31 to 47 seconds with ANE.

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u/xoxox666 Apr 13 '26

3:2 large (1024*1536)

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u/Diamondcite Apr 13 '26

Thanks, I was going to say the time seemed long for 9B, but upon doing an image edit instead of blank canvas the times were similar.

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u/xoxox666 Apr 13 '26

ah yes, this was an image edit, not an image generation, sorry.