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![Teaser](./editing.jpg) ![Teaser](./editing.jpg)
![Teaser](./others.jpg) ![Teaser](./others.jpg)
The FLUX.2 [klein] model family are our fastest image models to date. FLUX.2 [klein] unifies generation and editing in a single compact architecture, **delivering state-of-the-art quality with end-to-end inference in as low as under a second**. Built for applications that require real-time image generation without sacrificing quality, and runs on consumer hardware, with as little as 13GB VRAM. `FLUX.2 [klein] 4B` is a 4 billion parameter rectified flow transformer capable of generating images from text descriptions and supports multi-reference editing capabilities.
FLUX.2 [klein] 4B is a 4 billion parameter rectified flow transformer capable of generating images from text descriptions and supports multi-reference editing capabilities.
Fully open under Apache 2.0. Our most accessible model runs on consumer GPUs like the RTX 3090/4070. Compact but capable: supports text-to-image, image editing, and multi-reference at quality that punches above its size. Built for local development, edge deployment, and production use.
This repository holds an FP8 version of FLUX.2 [klein] 4B. The main repository of this model (full BF16 weights) can be found [here](https://huggingface.co/black-forest-labs/FLUX.2-klein-4B).
For more information, please read our [blog post](https://bfl.ai/blog/flux2-klein-towards-interactive-visual-intelligence). For more information, please read our [blog post](https://bfl.ai/blog/flux2-klein-towards-interactive-visual-intelligence).
# **Key Features** This repository holds an [FP8 version](https://huggingface.co/black-forest-labs/FLUX.2-klein-4b-fp8/blob/main/flux-2-klein-4b-fp8.safetensors) of FLUX.2 [klein] 4B. The main repository of this model (full BF16 weights) can be found [here](https://huggingface.co/black-forest-labs/FLUX.2-klein-4B).
1. Our fastest distilled model for sub-second image generation.
2. Best suited for interactive workflows, production deployments, and latency-critical applications.
3. Text-to-image and image-to-image multi-reference editing in a single unified model.
4. Runs on consumer GPUs (~13GB VRAM).
5. Open weights available for commercial use under the [Apache 2.0 license](https://www.apache.org/licenses/LICENSE-2.0).
# **Usage**
We provide a reference implementation of FLUX.2 [klein] 4B, as well as sampling code, in a dedicated [GitHub repository](https://github.com/black-forest-labs/flux2). Developers and creatives looking to build on top of FLUX.2 [klein] 4B are encouraged to use this as a starting point.
## **API Endpoints**
The FLUX.2 [klein] 4B model is available via the BFL API:
- [bfl.ai](https://bfl.ai)
FLUX.2 [klein] 4B is also available in both [ComfyUI](https://github.com/comfyanonymous/ComfyUI) and [Diffusers](https://github.com/huggingface/diffusers).
## **Using with Diffusers 🧨**
To use FLUX.2 [klein] 4B with the 🧨 Diffusers python library, first install or upgrade diffusers:
```shell
pip install -U diffusers
```
Then you can use Flux2KleinPipeline to run the model:
```python
import torch
from diffusers import Flux2KleinPipeline
device = "cuda"
dtype = torch.bfloat16
pipe = Flux2KleinPipeline.from_pretrained("black-forest-labs/FLUX.2-klein-4B", torch_dtype=dtype)
pipe.enable_model_cpu_offload() # save some VRAM by offloading the model to CPU
prompt = "A cat holding a sign that says hello world"
image = pipe(
prompt,
height=1024,
width=1024,
guidance_scale=4.0,
num_inference_steps=4,
generator=torch.Generator(device=device).manual_seed(0)
).images[0]
image.save("flux-klein.png")
```
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