FLUX.1 Fill [dev] on 32 GB of VRAM
Yes. 16-bit fits on 32 GB with 5.6 GB to spare. The inpainting and outpainting model from the FLUX.1 Tools release. Same 12B size class as FLUX.1 dev.
Runs well
Yes.
Take 16-bit (23.8 GB). In use it comes to about 26.4 GB, with 5.6 GB left over on 32 GB.
Best file16-bit
File size23.8 GB
VRAM needed~26.4 GB
System RAM48 GB+
Memory map · 32 GB GPU26.4 GB / 32 GB
016 GB32 GB
Weights 16-bit · 23.8 GBWorking memory · 1.8 GBReserve · 0.8 GBFree · 5.6 GB
calculated How this is counted.
01What to download
| Part | File | Folder | Size | |
|---|---|---|---|---|
| Model | flux1-fill-dev.safetensors 16-bit · black-forest-labs/FLUX.1-Fill-dev | models/diffusion_models | 23.8 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 | 29.3 GB | |||
Alternatives: T5-XXL FP16 (9.8 GB). Sizes from Hugging Face, 2026-10-01.
System RAM: 48 GB or more. These files take about 29.3 GB of RAM while loaded, 35.3 GB with Windows and ComfyUI. What happens with less. calculated
02Every file, on 32 GB
| File | Size | Needed | On this card | Quality | Download |
|---|---|---|---|---|---|
| 16-bit ← SAFETENSORS · black-forest-labs | 23.8 GB | 26.4 GB | fits · 5.6 GB spare | the original weights | Hugging Face → |
| Q8_0 GGUF · YarvixPA | 12.7 GB | 15.3 GB | fits · 16.7 GB spare | practically identical to the original | Hugging Face → |
| Q6_K GGUF · YarvixPA | 9.9 GB | 12.5 GB | fits · 19.5 GB spare | very close to the original | Hugging Face → |
| Q5_K_S GGUF · YarvixPA | 8.3 GB | 10.9 GB | fits · 21.1 GB spare | close; small differences in fine detail | Hugging Face → |
| Q4_K_S GGUF · YarvixPA | 6.8 GB | 9.4 GB | fits · 22.6 GB spare | good; some loss in fine detail and text | Hugging Face → |
| Q3_K_S GGUF · YarvixPA | 5.2 GB | 7.8 GB | fits · 24.2 GB spare | noticeable loss of detail | Hugging Face → |
“Needed” adds 1.8 GB of working memory for FLUX.1 Fill and a 0.8 GB reserve. Sizes 2026-10-01.