#
Flux

Flux is a series of text-to-image generation models based on diffusion transformers.

> We recommend using a `inf2.24xlarge` instance with tensor parallel size 8 for the model compilation and inference.

###
Export to Neuron

- Option 1: CLI

    optimum-cli export neuron --model black-forest-labs/FLUX.1-dev --tensor_parallel_size 8 --batch_size 1 --height 1024 --width 1024 --num_images_per_prompt 1 --torch_dtype bfloat16 flux_dev_neuron/

- Option 2: Python API

    from optimum.neuron import NeuronFluxPipeline

    if __name__ == "__main__":
        compiler_args = {"auto_cast": "none"}
        input_shapes = {"batch_size": 1, "height": 1024, "width": 1024}

        pipe = NeuronFluxPipeline.from_pretrained(
            "black-forest-labs/FLUX.1-dev",
            torch_dtype=torch.bfloat16,
            export=True,
            tensor_parallel_size=8,
            **compiler_args,
            **input_shapes
        )

        # Save locally
        pipe.save_pretrained("flux_dev_neuron_1024_tp8/")

        # Upload to the HuggingFace Hub
        pipe.push_to_hub(
            "flux_dev_neuron_1024_tp8/", repository_id="Jingya/FLUX.1-dev-neuronx-1024x1024-tp8"  # Replace with your HF Hub repo id
        )

##
Guidance-distilled

- The guidance-distilled variant takes about 50 sampling steps for good-quality generation.

    from optimum.neuron import NeuronFluxPipeline

    pipe = NeuronFluxPipeline.from_pretrained("flux_dev_neuron_1024_tp8/")
    prompt = "A cat holding a sign that says hello world"
    out = pipe(
        prompt,
        guidance_scale=3.5,
        num_inference_steps=50,
        generator=torch.Generator("cpu").manual_seed(0)
    ).images[0]
    out.save("flux_optimum.png")

##
Timestep-distilled

- max_sequence_length cannot be more than 256.
- guidance_scale needs to be 0.
- As this is a timestep-distilled model, it benefits from fewer sampling steps.

    optimum-cli export neuron --model black-forest-labs/FLUX.1-schnell --tensor_parallel_size 8 --batch_size 1 --height 1024 --width 1024 --num_images_per_prompt 1 --sequence_length 256 --torch_dtype bfloat16 flux_schnell_neuron_1024_tp8/

    import torch
    from optimum.neuron import NeuronFluxPipeline

    pipe = NeuronFluxPipeline.from_pretrained("flux_schnell_neuron_1024_tp8")
    prompt = "A cat holding a sign that says hello world"
    out = pipe(prompt, max_sequence_length=256, num_inference_steps=4).images[0]

##
NeuronFluxPipeline

The Flux pipeline for text-to-image generation.

###
class optimum.neuron.NeuronFluxPipeline

< source >

( config: dict[str, typing.Any] configs: dict[str, 'PretrainedConfig'] neuron_configs: dict[str, 'NeuronDefaultConfig'] data_parallel_mode: typing.Literal['none', 'unet', 'transformer', 'all'] scheduler: diffusers.schedulers.scheduling_utils.SchedulerMixin | None vae_decoder: torch.jit._script.ScriptModule | NeuronModelVaeDecoder text_encoder: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None text_encoder_2: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None unet: torch.jit._script.ScriptModule | NeuronModelUnet | None = None transformer: torch.jit._script.ScriptModule | NeuronModelTransformer | None = None vae_encoder: torch.jit._script.ScriptModule | NeuronModelVaeEncoder | None = None image_encoder: torch.jit._script.ScriptModule | None = None safety_checker: torch.jit._script.ScriptModule | None = None tokenizer: transformers.models.clip.tokenization_clip.CLIPTokenizer | transformers.models.t5.tokenization_t5.T5Tokenizer | None = None tokenizer_2: transformers.models.clip.tokenization_clip.CLIPTokenizer | None = None feature_extractor: transformers.models.clip.feature_extraction_clip.CLIPFeatureExtractor | None = None controlnet: torch.jit._script.ScriptModule | list[torch.jit._script.ScriptModule]| NeuronControlNetModel | NeuronMultiControlNetModel | None = None requires_aesthetics_score: bool = False force_zeros_for_empty_prompt: bool = True add_watermarker: bool | None = None model_save_dir: str | pathlib.Path | tempfile.TemporaryDirectory | None = None model_and_config_save_paths: dict[str, tuple[str, pathlib.Path]] | None = None )

####
__call__

< source >

( *args **kwargs )

##
NeuronFluxInpaintPipeline

The Flux pipeline for image inpainting.

###
class optimum.neuron.NeuronFluxInpaintPipeline

< source >

( config: dict[str, typing.Any] configs: dict[str, 'PretrainedConfig'] neuron_configs: dict[str, 'NeuronDefaultConfig'] data_parallel_mode: typing.Literal['none', 'unet', 'transformer', 'all'] scheduler: diffusers.schedulers.scheduling_utils.SchedulerMixin | None vae_decoder: torch.jit._script.ScriptModule | NeuronModelVaeDecoder text_encoder: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None text_encoder_2: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None unet: torch.jit._script.ScriptModule | NeuronModelUnet | None = None transformer: torch.jit._script.ScriptModule | NeuronModelTransformer | None = None vae_encoder: torch.jit._script.ScriptModule | NeuronModelVaeEncoder | None = None image_encoder: torch.jit._script.ScriptModule | None = None safety_checker: torch.jit._script.ScriptModule | None = None tokenizer: transformers.models.clip.tokenization_clip.CLIPTokenizer | transformers.models.t5.tokenization_t5.T5Tokenizer | None = None tokenizer_2: transformers.models.clip.tokenization_clip.CLIPTokenizer | None = None feature_extractor: transformers.models.clip.feature_extraction_clip.CLIPFeatureExtractor | None = None controlnet: torch.jit._script.ScriptModule | list[torch.jit._script.ScriptModule]| NeuronControlNetModel | NeuronMultiControlNetModel | None = None requires_aesthetics_score: bool = False force_zeros_for_empty_prompt: bool = True add_watermarker: bool | None = None model_save_dir: str | pathlib.Path | tempfile.TemporaryDirectory | None = None model_and_config_save_paths: dict[str, tuple[str, pathlib.Path]] | None = None )

####
__call__

< source >

( *args **kwargs )

With `NeuronFluxInpaintPipeline`, pass the original image and a mask of what you want to replace in the original image. Then replace the masked area with content described in a prompt.

    from diffusers.utils import load_image
    from optimum.neuron import NeuronFluxInpaintPipeline

    pipe = NeuronFluxInpaintPipeline.from_pretrained("Jingya/Flux.1-Schnell-1024x1024-neuronx-tp8")
    prompt = "Face of a yellow cat, high resolution, sitting on a park bench"
    img_url = "https://raw.githubusercontent.com/CompVis/latent-diffusion/main/data/inpainting_examples/overture-creations-5sI6fQgYIuo.png"
    mask_url = "https://raw.githubusercontent.com/CompVis/latent-diffusion/main/data/inpainting_examples/overture-creations-5sI6fQgYIuo_mask.png"
    source = load_image(img_url)
    mask = load_image(mask_url)
    images = pipe(prompt=prompt, image=source, mask_image=mask, max_sequence_length=256)

##
NeuronFluxKontextPipeline

The Flux pipeline for image editing.

###
class optimum.neuron.NeuronFluxKontextPipeline

< source >

( config: dict[str, typing.Any] configs: dict[str, 'PretrainedConfig'] neuron_configs: dict[str, 'NeuronDefaultConfig'] data_parallel_mode: typing.Literal['none', 'unet', 'transformer', 'all'] scheduler: diffusers.schedulers.scheduling_utils.SchedulerMixin | None vae_decoder: torch.jit._script.ScriptModule | NeuronModelVaeDecoder text_encoder: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None text_encoder_2: torch.jit._script.ScriptModule | NeuronModelTextEncoder | None = None unet: torch.jit._script.ScriptModule | NeuronModelUnet | None = None transformer: torch.jit._script.ScriptModule | NeuronModelTransformer | None = None vae_encoder: torch.jit._script.ScriptModule | NeuronModelVaeEncoder | None = None image_encoder: torch.jit._script.ScriptModule | None = None safety_checker: torch.jit._script.ScriptModule | None = None tokenizer: transformers.models.clip.tokenization_clip.CLIPTokenizer | transformers.models.t5.tokenization_t5.T5Tokenizer | None = None tokenizer_2: transformers.models.clip.tokenization_clip.CLIPTokenizer | None = None feature_extractor: transformers.models.clip.feature_extraction_clip.CLIPFeatureExtractor | None = None controlnet: torch.jit._script.ScriptModule | list[torch.jit._script.ScriptModule]| NeuronControlNetModel | NeuronMultiControlNetModel | None = None requires_aesthetics_score: bool = False force_zeros_for_empty_prompt: bool = True add_watermarker: bool | None = None model_save_dir: str | pathlib.Path | tempfile.TemporaryDirectory | None = None model_and_config_save_paths: dict[str, tuple[str, pathlib.Path]] | None = None )

####
__call__

< source >

( *args **kwargs )

With `NeuronFluxKontextPipeline`, pass the original image and a prompt describing what you want to change about the original image.

    from diffusers.utils import load_image
    from optimum.neuron import NeuronFluxKontextPipeline

    pipe = NeuronFluxKontextPipeline.from_pretrained("Jlonge4/FLUX.1-kontext-neuronx-1024x1024-tp8")
    prompt = "Change the cushions in the chair from red to green"
    img_url = "https://huggingface.co/datasets/Jlonge4/document_images/resolve/main/flux_optimum.png"
    source = load_image(img_url)
    images = pipe(prompt=prompt, image=source, guidance_scale=2.5)

Image | Prompt | Output
--- | --- | ---
| Change the cushions in the chair from red to green |

Are there any other diffusion features that you want us to support in 🤗`Optimum-neuron`? Please file an issue to `Optimum-neuron` Github repo or discuss with us on HuggingFace’s community forum, cheers 🤗 !