Flux2ImageNode - ComfyUI Built-in Node Documentation

Generate images using the Flux.2 [pro] or Flux.2 [max] model from a text prompt and optional reference images.

Generate images using the Flux.2 [pro] or Flux.2 [max] model from a text prompt and optional reference images. The node sends the request to the BFL API, polls until the result is ready, and returns the generated image.

Inputs

Common Inputs

Parameter	Description	Data Type	Required	Range
model	The Flux.2 model version to use. Selecting a model unlocks additional parameters for width, height, and optional reference images.	DYNAMIC_COMBO	Yes	”Flux.2 [pro]" "Flux.2 [max]“
prompt	Prompt for the image generation or edit (default: empty string).	STRING	Yes	N/A
seed	The random seed used for creating the noise (default: 0). Supports the control-after-generate option to randomize the value after each run.	INT	Yes	0 to 18446744073709551615

Flux.2 [pro] and Flux.2 [max] Inputs

Shared by both models — the parameter sets are identical.

Parameter	Description	Data Type	Required	Range
model.width	The width of the generated image in pixels (default: 1024).	INT	Yes	256 to 2048 (step 32)
model.height	The height of the generated image in pixels (default: 768).	INT	Yes	256 to 2048 (step 32)

Reference Inputs

Parameter	Description	Data Type	Required	Range
model.images	Optional reference image(s) for image-to-image generation. Up to 8 images. Growable slot: connect 1..8 items (image_1…image_8).	IMAGE	No	0 to 8 images

Note:

• The maximum number of reference images is 8. If more than 8 images are provided, an error is raised. Batch images count toward this limit, since each image in a batch is counted individually.
• Reference images are resized so that the total pixel count does not exceed 2048 x 2048 before being sent to the API.
• The model.width and model.height values affect the generation cost. The cost also depends on the selected model and on whether reference images are provided.

Outputs

Output Name	Description	Data Type
image	The generated image as a tensor, downloaded from the BFL API result.	IMAGE

This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! Edit on GitHub

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