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# Flux2

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  <img alt="LoRA" src="https://img.shields.io/badge/LoRA-d8b4fe?style=flat"/>
  <img alt="MPS" src="https://img.shields.io/badge/MPS-000000?style=flat&logo=apple&logoColor=white%22">
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Flux.2 is the recent series of image generation models from Black Forest Labs, preceded by the [Flux.1](./flux.md) series. It is an entirely new model with a new architecture and pre-training done from scratch!

Original model checkpoints for Flux can be found [here](https://huggingface.co/black-forest-labs). Original inference code can be found [here](https://github.com/black-forest-labs/flux2).

> [!TIP]
> Flux2 can be quite expensive to run on consumer hardware devices. However, you can perform a suite of optimizations to run it faster and in a more memory-friendly manner. Check out [this section](https://huggingface.co/blog/sd3#memory-optimizations-for-sd3) for more details. Additionally, Flux can benefit from quantization for memory efficiency with a trade-off in inference latency. Refer to [this blog post](https://huggingface.co/blog/quanto-diffusers) to learn more.
>
> [Caching](../../optimization/cache) may also speed up inference by storing and reusing intermediate outputs.

## Caption upsampling

Flux.2 can potentially generate better better outputs with better prompts. We can "upsample"
an input prompt by setting the `caption_upsample_temperature` argument in the pipeline call arguments.
The [official implementation](https://github.com/black-forest-labs/flux2/blob/5a5d316b1b42f6b59a8c9194b77c8256be848432/src/flux2/text_encoder.py#L140) recommends this value to be 0.15.

## Flux2Pipeline

[[autodoc]] Flux2Pipeline
	- all
	- __call__

## Flux2KleinPipeline

[[autodoc]] Flux2KleinPipeline
	- all
	- __call__

## Flux2KleinKVPipeline

[[autodoc]] Flux2KleinKVPipeline
	- all
	- __call__