POST/api/v1/imagine3 creditsSynchronous

GPT-Image-1.5

Provider · OpenAIType · T2I / EditModel ID · gpt-image-1.5Upstream ID · gpt-image-1.5

OpenAI GPT-Image-1.5. Improved consistency and detail fidelity over GPT-Image-1. Recommended when you need slightly better quality and are willing to pay one additional credit.

Request Parameters

Parameter	Type	Required	Description
prompt	`string`	Required	The text prompt describing the image to generate.
model	`string`	Optional	Set to `gpt-image-1.5` to use this model.Default: `gpt-image-1.5`
image_url	`string`	Optional	Reference image URL for image-to-image generation. Optional — omit for pure text-to-image.
aspect_ratio	`string`	Optional	Output aspect ratio. Allowed: 1:1 · 16:9 · 9:16 · 4:3 · 3:4 · 3:2 · 2:3.Default: `1:1`
webhook_url	`string`	Optional	URL where we POST the completed task result.
webhook_secret	`string`	Optional	Sent as x-webhook-secret header in webhook delivery for verification.

Example Request

cURL

curl -X POST https://api.journeyapi.com/api/v1/imagine \
  -H "Authorization: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-1.5",
    "prompt": "a hyperrealistic oil painting of a lighthouse at dusk",
    "aspect_ratio": "3:4"
  }'

Response

This model is synchronous — the response includes the finished image_url directly. No polling required.

200 OK

{
  "task_id": "550e8400-e29b-41d4-a716-446655440000",
  "status": "finished",
  "image_url": "https://cdn.example.com/output.png"
}