OpenAI

gpt-image-2.5-ext

IMAGE

GPT-Image-2.5-Ext is an image generation and editing model that supports Flare and Sunburst variants, text-to-image generation, and editing with up to 16 reference images.

gpt-image-2.5-ext

PROVIDERSOpenAIENDPOINTSimage-generationCAPABILITIEStext_to_image · image_to_image

PRICING

Pricing is based on the number of generated images and resolution. Actual charges are based on the final output.

Resolution	Unit price
1K	$0.0085 / image
2K	$0.014 / image
4K	$0.021 / image

Cost: number of generated images × unit price Generated image count: 1-4 images

Parameter	Type	Default	Range / values	Description
`model` *	`enum`	`gpt-image-2.5-ext`	gpt-image-2.5-ext	Model name.
`version`	`enum`	`flare`	flare · sunburst	Generation variant. flare prioritizes speed for high-volume creation; sunburst prioritizes editing precision for refined assets.
`prompt` *	`string`	—	—	Text description for image generation or editing. Describe the subject, scene, composition, style, lighting, and the content to preserve or modify.
`size`	`enum`	`auto`	auto · 1:1 · 16:9 · 9:16 · 4:3 · 3:4 · 3:2 · 2:3 · 5:4 · 4:5 · 21:9	Output image aspect ratio. auto lets the service select an appropriate ratio.
`resolution`	`enum`	`1K`	1K · 2K · 4K	Output image resolution tier.
`n`	`integer`	`1`	1 ~ 4	Number of images to generate. Pass a number, not a quoted string.
`image_urls`	`array`	—	0 ~ 16 items; each item is a public image URL or a data URI	Reference image array for image-to-image generation or editing. Supports up to 16 image URLs or base64 data URIs.