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POST
GPT Image 2.5 Ext Sunburst
gpt-image-2.5-ext-sunburst is the Sunburst alias for GPT Image 2.5 Ext. It maps to the same Ext contract and prices as gpt-image-2.5-ext. Use this ID when a client can send only model and not version. Do not send version: "flare" with this model ID. Billing, references, async headers, and response shapes are identical to the canonical Ext page.
string
required
Set to gpt-image-2.5-ext-sunburst.
string
required
Describe the subject, composition, lighting, and style.
string
default:"sunburst"
Omit this field or set it to sunburst.
string
default:"1K"
Use 1K, 2K, or 4K.
string
default:"auto"
Use auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 5:4, 4:5, or 21:9.
integer
default:"1"
Request 1 to 4 images.
string[]
Optional. Up to 16 public image URLs or PNG/JPEG/WebP Data URLs. References do not change the price.

Request

A successful wait returns data[].url. Send Prefer: respond-async and poll GET /v1/tasks/{id} when you want a gateway task immediately. See GPT Image 2.5 Ext for the full parameter and billing rules.

Open the model playground

Run Ext from the FreeModel model page. Choose Sunburst there or send this model ID.