OpenAIGPTImage1 - ComfyUI Built-in Node Documentation

Complete documentation for the OpenAIGPTImage1 node in ComfyUI. Learn its inputs, outputs, parameters and usage.

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

Generates images synchronously via OpenAI’s GPT Image endpoint. This node can create new images from text prompts or edit existing images when provided with an input image and optional mask. It supports multiple GPT Image models, including gpt-image-1, gpt-image-1.5, and gpt-image-2.

Inputs

Parameter	Data Type	Required	Range	Description
prompt	STRING	Yes	-	Text prompt for GPT Image (default: "")
seed	INT	No	0 to 2147483647	Random seed for generation (default: 0) - not implemented yet in backend
quality	COMBO	No	”low" "medium" "high”	Image quality, affects cost and generation time (default: “low”)
background	COMBO	No	”auto" "opaque" "transparent”	Return image with or without background (default: “auto”)
size	COMBO	No	”auto" "1024x1024" "1024x1536" "1536x1024" "2048x2048" "2048x1152" "1152x2048" "3840x2160" "2160x3840" "Custom”	Image size. Select “Custom” to use the custom width and height (GPT Image 2 only) (default: “auto”)
n	INT	No	1 to 8	How many images to generate (default: 1)
image	IMAGE	No	-	Optional reference image for image editing
mask	MASK	No	-	Optional mask for inpainting (white areas will be replaced)
model	COMBO	No	”gpt-image-1" "gpt-image-1.5" "gpt-image-2”	GPT Image model to use (default: “gpt-image-2”)
custom_width	INT	No	1024 to 3840	Used only when size is “Custom”. Must be a multiple of 16 (GPT Image 2 only) (default: 1024)
custom_height	INT	No	1024 to 3840	Used only when size is “Custom”. Must be a multiple of 16 (GPT Image 2 only) (default: 1024)

Parameter Constraints:

• When image is provided, the node switches to image editing mode
• mask can only be used when image is provided
• When using mask, only single images are supported (batch size must be 1)
• mask and image must be the same size
• Custom resolution (size = “Custom”) is only supported by the gpt-image-2 model
• Custom width and height must be multiples of 16
• Custom resolution aspect ratio must not exceed 3:1
• Custom resolution total pixels must be between 655,360 and 8,294,400
• Transparent background is not supported for the gpt-image-2 model
• Sizes larger than 1536x1024 (e.g., 2048x2048, 3840x2160) are only supported by the gpt-image-2 model

Outputs

Output Name	Data Type	Description
IMAGE	IMAGE	Generated or edited image(s)

---

Source fingerprint (SHA-256): 826d393831ee38e97dad3ea238877d0aeb5bf16778612c51cdc0ca4816efead2