FluxProUltraImageNode - ComfyUI Built-in Node Documentation

Generates images using Flux Pro 1.1 Ultra via API based on prompt and resolution. This node connects to an external service to create images according to your text description and specified dimensions.

Inputs

Parameter	Description	Data Type	Required	Range
`prompt`	Prompt for the image generation (default: empty string)	STRING	Yes	-
`prompt_upsampling`	Whether to perform upsampling on the prompt. If active, automatically modifies the prompt for more creative generation, but results are nondeterministic (same seed will not produce exactly the same result). (default: False)	BOOLEAN	No	-
`seed`	The random seed used for creating the noise. (default: 0)	INT	No	0 to 18446744073709551615
`aspect_ratio`	Aspect ratio of image; must be between 1:4 and 4:1. (default: “16:9”)	STRING	No	-
`raw`	When True, generate less processed, more natural-looking images. (default: False)	BOOLEAN	No	-
`image_prompt`	Optional reference image to guide generation	IMAGE	No	-
`image_prompt_strength`	Blend between the prompt and the image prompt. (default: 0.1)	FLOAT	No	0.0 to 1.0

Note: The aspect_ratio parameter must be between 1:4 and 4:1. When image_prompt is provided, image_prompt_strength becomes active and controls how much the reference image influences the final output. If image_prompt is not provided, the prompt parameter is validated to ensure it is not empty.

Outputs

Output Name	Description	Data Type
`output_image`	The generated image from Flux Pro 1.1 Ultra	IMAGE

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Inputs

Outputs