FLUX.1 Krea [dev] on 20 GB of VRAM
Yes. Q8_0 fits on 20 GB with 5.0 GB to spare. A FLUX.1 dev fine-tune by Krea, aimed at a more photographic, less "AI-looking" style. Same architecture and sizes as dev.
Runs well
Yes.
Take Q8_0 (12.7 GB). In use it comes to about 15.0 GB, with 5.0 GB left over on 20 GB.
Best fileQ8_0
File size12.7 GB
VRAM needed~15.0 GB
System RAM32 GB+
Memory map · 20 GB GPU15.0 GB / 20 GB
010 GB20 GB
Weights Q8_0 · 12.7 GBWorking memory · 1.5 GBReserve · 0.8 GBFree · 5.0 GB
calculated How this is counted.
Got an RTX 40 or 50? Swap Q8_0 for FP8 (11.9 GB): same quality class, computed natively there.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | flux1-krea-dev-Q8_0.gguf Q8_0 · QuantStack/FLUX.1-Krea-dev-GGUF | models/unet | 12.7 GB | Download → |
| Text encoder | t5xxl_fp8_e4m3fn.safetensors T5-XXL FP8 · comfyanonymous/flux_text_encoders | models/text_encoders | 4.9 GB | Download → |
| Text encoder | clip_l.safetensors CLIP-L · comfyanonymous/flux_text_encoders | models/text_encoders | 0.2 GB | Download → |
| VAE | ae.safetensors FLUX.1 VAE (ae) · Comfy-Org/Lumina_Image_2.0_Repackaged | models/vae | 0.3 GB | Download → |
| Total download · keep about the same free on disk | 18.2 GB | |||
Alternatives: T5-XXL FP16 (9.8 GB). Sizes from Hugging Face, 2026-10-01.
02Every file, on 20 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit SAFETENSORS · black-forest-labs | 23.8 GB | 26.1 GB | 6.1 GB too big | the original weights | Hugging Face → |
| Q8_0 ← GGUF · QuantStack | 12.7 GB | 15.0 GB | fits · 5.0 GB spare | practically identical to the original | Hugging Face → |
| FP8 SAFETENSORS · Comfy-Org | 11.9 GB | 14.2 GB | fits · 5.8 GB spare | practically identical to the original | Hugging Face → |
| Q6_K GGUF · QuantStack | 9.8 GB | 12.1 GB | fits · 7.9 GB spare | very close to the original | Hugging Face → |
| Q5_K_M GGUF · QuantStack | 8.4 GB | 10.7 GB | fits · 9.3 GB spare | close; small differences in fine detail | Hugging Face → |
| Q4_K_M GGUF · QuantStack | 6.9 GB | 9.2 GB | fits · 10.8 GB spare | good; some loss in fine detail and text | Hugging Face → |
| Q3_K_M GGUF · QuantStack | 5.4 GB | 7.7 GB | fits · 12.3 GB spare | noticeable loss of detail | Hugging Face → |
| Q2_K GGUF · QuantStack | 4.0 GB | 6.3 GB | fits · 13.7 GB spare | heavy loss; a last resort | Hugging Face → |
“Needed” adds 1.5 GB of working memory for FLUX.1 Krea and a 0.8 GB reserve. Sizes 2026-10-01.