Official image models - Kaien API

Do not send response_format. Read the image from data[0].url. Models: gpt-image-2-t, gpt-image-2.5-flare-t, gpt-image-2.5-sunburst-t, gpt-image-2.6-flare-t, gpt-image-2.6-sunburst-t.

Text to image

curl https://kaienapi.com/v1/images/generations \
  -H "Authorization: Bearer <YOUR_API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2-t",
    "prompt": "A small red paper boat on calm blue water, no text",
    "size": "1024x1024",
    "n": 1
  }'

Image to image

Use the same POST /v1/images/generations. Put your own public image URLs in image.

curl https://kaienapi.com/v1/images/generations \
  -H "Authorization: Bearer <YOUR_API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2.6-flare-t",
    "prompt": "Keep the same subject. Place a small yellow rubber duck beside it. No text.",
    "image": [
      "https://example.com/reference.png"
    ],
    "size": "1024x1024",
    "n": 1
  }'

Put multiple references in the same array, in order, and say what each image is for:

curl https://kaienapi.com/v1/images/generations \
  -H "Authorization: Bearer <YOUR_API_KEY>" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2.6-flare-t",
    "prompt": "Keep the subject from image 1. Use the outfit from image 2.",
    "image": [
      "https://example.com/subject.png",
      "https://example.com/outfit.png"
    ],
    "size": "1024x1024",
    "n": 1
  }'