FLUX.1-dev vs Z-Image
Specs, VRAM requirements and download trends — updated 20 September 2026.
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | FLUX.1-dev | Z-Image |
|---|---|---|
| Parameters | 11.9 B | 6.2 B |
| Architecture | — | — |
| Context length | — | — |
| Licence | other | apache-2.0 |
| Commercial use | Unknown | Allowed |
| Languages | 1 | 1 |
| Downloads 30d | 764,743 | 61,852 |
| Downloads all time | 33.6 M | 359 K |
| Quantizations on the Hub | SAFETENSORS | SAFETENSORS |
| Gated | Yes — accept licence | No |
| First seen on the Hub | 2024-07-31 | 2026-01-23 |
Download trend
Daily snapshots, last 55 days (28 Jul – 20 Sep)
835 K21 K
FLUX.1-dev
Z-Image
VRAM side by side
On RTX 4090 · 24 GB · 8K context unless noted
Z-Image · fp16
24.0 GB / 24 GB
FLUX.1-dev · fp16
66.0 GB / 24 GB