Black Forest Labs
Flux.1 Schnell
Fast version of Flux. Only 4 inference steps needed. Near-instant generation on good GPUs.
12B parametersrectified-flowapache-2.08GB - 20GB VRAM
Check Your Hardware
See which quantizations of Flux.1 Schnell your hardware can run.
Quantization Options
| Quantization | Bits | File Size | VRAM Needed | RAM Needed | Quality |
|---|---|---|---|---|---|
| FP16 | 16 | 24 GB | 20 GB | 28 GB | 100% |
| FP8 | 8 | 12 GB | 12 GB | 16 GB | 95% |
| NF4 | 4 | 8 GB | 8 GB | 12 GB | 85% |
Frequently Asked Questions
How much VRAM do I need to run Flux.1 Schnell?
Flux.1 Schnell requires 8GB VRAM minimum with FP16 quantization. For full precision, you need 20GB VRAM.
What is the best quantization for Flux.1 Schnell?
Q4_K_M offers the best balance of quality and VRAM usage. Q8_0 is near-lossless if you have enough VRAM.