---
license: apache-2.0
license_link: https://github.com/black-forest-labs/flux2/blob/main/README.md
base_model:
- black-forest-labs/FLUX.2-dev
tags:
- vae
- diffusion-single-file
- comfyui
- flux
---

# FLUX.2 autoencoder, single file (mirror)

The single-file FLUX.2 VAE that
[stable-diffusion.cpp](https://github.com/leejet/stable-diffusion.cpp) needs for both FLUX.2 [dev]
and FLUX.2 klein, mirrored from
[Comfy-Org/flux2-dev](https://huggingface.co/Comfy-Org/flux2-dev).

Unsloth Studio fetches this on the no-GPU (native sd.cpp) path. It used to come straight from the
community repack; a rename or a takedown there turns every CPU FLUX.2 load into a 404, so it is
mirrored here. **The weights are unmodified:** byte for byte the file of the same name in the
source repo.

| File | Size | Upstream model | Licence |
|---|---|---|---|
| `split_files/vae/flux2-vae.safetensors` | 0.31 GiB | [black-forest-labs/FLUX.2-dev](https://huggingface.co/black-forest-labs/FLUX.2-dev) (autoencoder) | Apache-2.0 |

## Licence: Apache-2.0, and that is deliberate

The rest of FLUX.2 [dev] is under the FLUX Non-Commercial License. The **autoencoder is not**.
Black Forest Labs released it separately and says so in their own repository: "The autoencoder is
released under Apache 2.0" ([github.com/black-forest-labs/flux2](https://github.com/black-forest-labs/flux2)).

That matters here because FLUX.2 klein 4B is itself Apache-2.0 and needs this VAE. Bundling it
with the non-commercial conditioner would have put a permissive file behind a non-commercial
label. So it lives on its own, and the non-commercial half is at
[unsloth/FLUX.2-dev-ComfyUI](https://huggingface.co/unsloth/FLUX.2-dev-ComfyUI).

Full text in [`LICENSE`](https://huggingface.co/unsloth/FLUX.2-VAE/blob/main/LICENSE),
attribution and the statement of what the repack changed in
[`NOTICE`](https://huggingface.co/unsloth/FLUX.2-VAE/blob/main/NOTICE). Not an official Black
Forest Labs or ComfyUI product, and not endorsed by either.