OpenAI · Image API

GPT Image 1.5 Official

gpt-image-1.5-official

Official image route for high-fidelity generation, typography, and iterative edits.

POST/v1/images/generations

Output count1–4

Reference imagesUp to 15

Resolution tiersRoute native

Generation

Generate with GPT Image 1.5 Official

Use ImgRouter's unified request contract and this model ID. The example uses recommended defaults from the route's current parameter guide.

cURL

curl https://api.imgrouter.com/v1/images/generations \
  -H "Authorization: Bearer $IMGROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: gpt-image-1.5-official-generate-001" \
  -d '{
  "model": "gpt-image-1.5-official",
  "prompt": "Editorial product photograph, precise materials, soft studio light",
  "size": "1:1",
  "n": 1,
  "quality": "high",
  "output_format": "png"
}'

Request body

modelstring · requiredUse gpt-image-1.5-official.

promptstring · requiredGeneration or editing instruction between 1 and 5,000 characters.

sizestringSupported values: 1:1, 3:2, 2:3.

ninteger · 1–4Number of output images. Defaults to 1 and cannot exceed 4.

qualitystringRecommended value: high.

output_formatstringSupported values: png, jpeg.

reference_imagesstring[] · max 15Public HTTPS source images. Send this field to the edit endpoint.

Controls

Supported options

Aspect ratio or size

1:13:22:3

Output format

pngjpeg

Route notes

Use quality auto, low, medium, or high to select the cost and fidelity tier.

Transparent backgrounds require PNG output.

Supports up to fifteen reference images for complex editing and fusion.

Reference workflow

Edit with reference images

Send public HTTPS source images with the same core controls. This route accepts up to 15 reference images.

POST/v1/images/edits

cURL

curl https://api.imgrouter.com/v1/images/edits \
  -H "Authorization: Bearer $IMGROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: gpt-image-1.5-official-edit-001" \
  -d '{
  "model": "gpt-image-1.5-official",
  "prompt": "Preserve the subject and composition. Change the scene to soft blue hour.",
  "size": "1:1",
  "n": 1,
  "quality": "high",
  "output_format": "png",
  "reference_images": [
    "https://example.com/reference.jpg"
  ]
}'

Describe both the intended change and the details that must remain consistent. Stable source URLs produce the most reliable edit requests.

Response

Read the completed output

Successful requests return completed image URLs and a request ID. Store the assets you need permanently; routed output URLs may expire.

200 · application/json

{
  "id": "req_01K4…",
  "object": "image.generation",
  "created": 1787424152,
  "data": [
    { "url": "https://static.imgrouter.com/images/req_01K4.webp" }
  ],
  "usage": { "images": 1 }
}

Use GET /v1/requests/{request_id} for reconciliation and GET /v1/balance for the authenticated key's current Credit position.