Model reference · open weights
FLUX.2-klein-SDNQ-dynamic is an open-weight image model from Disty0, listed in the AxForge catalogue. AxForge can bring it up on EU-owned hardware for you on request — with the licence handled where one is required.
About
Dynamic 4 bit quantization of black-forest-labs/FLUX.2-klein-4B using SDNQ. This model uses per layer fine grained quantization. What dtype to use for a layer is selected dynamically by trial and error until the std normalized mse loss is lower than the selected threshold. Minimum allowed dtype is set to uint4 and std normalized mse loss threshold is set to 1e-2. This created a mixed precision model with uint4 and int5 dtypes. SVD quantization is disabled. Usage: Original BF16 vs SDNQ quantization comparison:
Summarised from the published model card. Read the full card on the HuggingFace links below.
Specifications
| Maker | Disty0 |
|---|---|
| Type | Image models |
| Parameters (lead) | 2.2B |
| Variants | 1 |
| Runs with | diffusers |
| Based on | black-forest-labs/FLUX.2-klein-4B |
| Released | 2026-01-15 |
| Popularity | 28k downloads / month |
| Likes | 19 |
| Licence | Commercial licence needed |
How it works
Variants
Open weights ship in several sizes and precisions. One page, all the variants — pick the one that fits your GPU. VRAM figures are estimates from model size.
| Variant | Params | Precision | VRAM | Fits 16 GB | Weights |
|---|---|---|---|---|---|
| FLUX.2-klein-4B-SDNQ-4bit-dynamic | 2.2B | BF16 | ~5 GB | ✓ | Weights ↗ |
Using it via the API
Once AxForge deploys flux-2-klein-sdnq-dynamic for you, it answers on the OpenAI-compatible API — the same base URL and keys as every other model. (flux-2-klein-sdnq-dynamic below is illustrative; you get the exact model name on deployment.)
$ curl -sS https://api.axforge.ai/v1/images/generations \
-H "Authorization: Bearer $AXFORGE_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"flux-2-klein-sdnq-dynamic","prompt":"a red bicycle","size":"1024x1024"}'
Details
Tags
Licence
The weights are open but apache-2.0 needs a commercial agreement for business use. AxForge can arrange that licence and host the model for you — you pay AxForge, we settle with the model’s maker. Ask us for a quote. Read the licence ↗