Image

GPT Image 1.5 image

OpenAI GPT Image 1.5 — legacy create with optional reference editing + mask.

Category: Create · gpt-image-1-5

How to use & limits

Text-to-image with optional reference-based editing and a mask (inpainting).
quality: low, medium or high.
size: 1:1, 2:3 or 3:2.
n: 1 to 4 images per request.
background: auto, transparent or opaque; output_format jpeg/png/webp.
mask_url marks the area to edit (used together with references).

Capabilities

What this model supports, straight from the schema — no pricing, no infrastructure detail.

Capability	Value
`n_max` Max variations per job	4
`image_edit` Image edit	Yes
`create_image` Text-to-image	Yes
`supports_mask` Supports mask	Yes
`image_to_image` Image-to-image	Yes
`max_prompt_length` Max prompt length	1000
`allowed_resolutions` Allowed resolutions	1K
`max_reference_images` Max reference images	4

Parameters

Fields accepted in params (or first-class, where applicable) for POST /generations.

Name	Label	Type	Required	Default	Options	Min / Max	Description
`prompt`	Prompt	textarea	Required	—	—	—	Image or edit description. Required.
`size`	Size	select	Optional	1:1	1:1 · 2:3 · 3:2	—	Aspect ratio: 1:1, 2:3 or 3:2. Default 1:1.
`n`	Quantity	number	Optional	1	—	1 – 4	Number of images, integer 1 to 4. Default 1.
`image_urls`	Optional references	multi_select	Optional	—	—	— – 4	Optional references: up to 4 images to guide or edit.
`mask_url`	Mask URL	url	Optional	—	—	—	Optional mask URL marking the region to edit.
`quality`	Quality	select	Optional	low	low · medium · high	—	Output quality: low, medium or high. Default low.
`output_format`	Output format	select	Optional	png	jpeg · png · webp	—	File format: jpeg, png or webp. Default png.
`background`	Background	select	Optional	auto	auto · transparent · opaque	—	Background: auto, transparent or opaque. Default auto.

Example request

bash

curl -X POST https://caranguejo.art/api/v1/dev/generations \
  -H "Authorization: Bearer $CK" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt-image-1-5",
  "prompt": "Minimalist app icon, transparent background, rounded corners.",
  "params": {
    "size": "1:1",
    "quality": "high",
    "background": "transparent",
    "n": 1
  }
}'

javascript

const res = await fetch("https://caranguejo.art/api/v1/dev/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer " + process.env.CK,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "gpt-image-1-5",
    "prompt": "Minimalist app icon, transparent background, rounded corners.",
    "params": {
      "size": "1:1",
      "quality": "high",
      "background": "transparent",
      "n": 1
    }
  }),
});
const { data } = await res.json();

Example response

json

{
  "id": "9f0c1a7e-…",
  "object": "generation",
  "model": "gpt-image-1-5",
  "type": "image",
  "status": "completed",
  "output": {
    "assets": [
      {
        "url": "https://media.caranguejo.art/outputs/example.png",
        "type": "image"
      }
    ],
    "images": [
      {
        "url": "https://media.caranguejo.art/outputs/example.png"
      }
    ]
  }
}

The job's real cost is returned as credits_charged on the completed response — check GET /balance for the account balance.

Common errors for this job type:

`insufficient_credits`	Account balance can't cover the job cost.
`content_policy_violation`	Prompt or media rejected by content policy.
`generation_timeout`	The job exceeded the maximum processing time.
`rate_limited`	Too many requests per minute.
`invalid_input`	A required parameter is missing or outside the model's schema.
`generation_failed`	Generic processing failure.