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openai/gpt-image-2.5-sunburst/text-to-image

OpenAI's GPT Image 2.5 Sunburst text-to-image, the quality-first model of the GPT Image 2.5 pair. Choose five quality tiers from low to max, 1K, 2K or 4K output and 15 aspect ratios from 1:3 to 3:1, as PNG, JPEG or WebP.

From $0.0018/image20% below the publisher's list price
Run model

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Send a request

Quickstart

Examples use the selected endpoint’s public parameter definitions. Replace the API key and example media, then send the request from your server.

SDKs & integrations
POSThttps://api.spicyapi.ai/api/v1/jobs/createTask

API authentication

Keep the API key in the server environment variable SPICY_API_KEY. Use Bearer authentication and Content-Type: application/json for JSON requests.

Authorization: Bearer $SPICY_API_KEY
GPT Image 2.5 Sunburst · Text to Image · Sample output
Sample outputUse this example
# Generate the idempotency key once; reuse it when retrying after a lost response.
export SPICY_IDEMPOTENCY_KEY="${SPICY_IDEMPOTENCY_KEY:-$(uuidgen)}"
curl -X POST https://api.spicyapi.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $SPICY_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $SPICY_IDEMPOTENCY_KEY" \
  -d '{
  "model": "openai/gpt-image-2.5-sunburst/text-to-image",
  "input": {
    "prompt": "A ceramic teapot on a linen cloth, soft window light, muted palette",
    "quality": "high",
    "resolution": "1k",
    "num_outputs": 1,
    "aspect_ratio": "1:1",
    "output_format": "png"
  }
}'

# Copy data.taskId from the response into TASK_ID, then poll the status.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.spicyapi.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Generated from this model’s input schema — the same one the API validates every request against.

Input parameters

Place these fields inside the request body’s input object. Names and types match the API. Do not assume a default when none is specified.

promptstringRequired

Up to 5,000 characters. Put every word that must appear in the image in double quotes and say where it goes; the rest is read as description. The first 100 input tokens of the prompt are included in the image price; longer prompts add a small charge per extra token, shown in the quote. Chinese, Japanese and Korean text counts about one token per character, other text about one token per four characters.

Default
Not specified
Constraints
minLength:1
maxLength:5000
official_fallbackbooleanOptional

On by default. A request for a single high-quality 1k PNG in 1:1, 3:2, 2:3, 4:3, 3:4, 16:9 or 9:16 runs on the economy route first; if that route cannot complete it, for example because it refuses the prompt, the request runs again on the official route and is billed at the official price instead of the economy price. Every other request runs on the official route from the start. Turn it off to pay only the economy price: requests the economy route cannot serve are then rejected, and one it takes may still be refused or fail.

Default
true
output_qualityintegerOptional

Compression quality for jpeg and webp, 0 to 100: higher keeps more detail and makes larger files. Not used for png, and it does not change the price.

Default
Not specified
Constraints
minimum:0
maximum:100
output_formatstringOptional

png (default), jpeg or webp. Does not change the price.

Default
"png"
Allowed values
"png""jpeg""webp"
num_outputsintegerOptionalAffects price

1 to 10 images from one request, 1 by default. Every image is billed separately.

Default
1
Constraints
minimum:1
maximum:10
qualitystringOptionalAffects price

low, medium, high (default), xhigh or max. Each step adds detail, time and cost; keep xhigh and max for finals.

Default
"high"
Allowed values
"low""medium""high""xhigh""max"
resolutionstringOptionalAffects price

1k (default), 2k or 4k. A square frame is 1024, 2048 or 2880 pixels across; a larger tier costs more per image. On the economy route a 1k image can come out somewhat larger.

Default
"1k"
Allowed values
"1k""2k""4k"
aspect_ratiostringOptionalAffects price

Fifteen shapes from 1:3 to 3:1, 1:1 by default. The shape changes the price: a wide or tall frame costs less than a square at the same tier.

Default
"1:1"
Allowed values
"1:1""1:2""1:3""2:1""2:3""3:1""3:2""3:4""4:3""4:5""5:4""9:16""9:21""16:9""21:9"

Track the task

HTTP 202 means the task was accepted, not completed. Save the returned taskId and query that task. Do not create another task while waiting for its result.

Accepted response
HTTP/1.1 202 Accepted
Location: /api/v1/jobs/recordInfo?taskId=job_01k3m8x9q2z4v7n5p6r8s0t1w3

{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_create",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "state": "queued",
    "estimatedCost": "0.750000"
  }
}

The accepted response includes the estimate so your app can show the same amount in task history and billing.

Read the job
curl --get "https://api.spicyapi.ai/api/v1/jobs/recordInfo" \
  --data-urlencode "taskId=$TASK_ID" \
  -H "Authorization: Bearer $SPICY_API_KEY"

Start polling at about 2 seconds and gradually increase the interval. Stop at a terminal state. After a connection failure, query the original taskId. Retry creation only with the original idempotency key and body.

Or let the callback find you
import { verifyWebhook } from "@spicyapi/sdk";

// express.raw keeps the bytes we signed; express.json never matches.
app.post("/hooks/spicy", express.raw({ type: "application/json" }), (req, res) => {
  const { payload } = verifyWebhook({
    rawBody: req.body,
    timestamp: req.header("X-Webhook-Timestamp"),
    signature: req.header("X-Webhook-Signature"),
    payloadVersion: Number(req.header("X-Webhook-Payload-Version")),
    secret: process.env.SPICY_WEBHOOK_SECRET,
  });
  res.status(200).end();
  void handleFinishedTask(payload);
});

Pass callBackUrl when you create the task and the finished record is POSTed to you — no polling loop at all. Every delivery carries X-Webhook-Timestamp, X-Webhook-Signature and X-Webhook-Payload-Version. The signature is a base64 HMAC-SHA256 over taskId.timestamp.sha256(body), so it must be checked against the raw bytes: parsing the JSON and re-serialising it changes them and the check will fail. Failed deliveries are retried, so the same taskId can arrive twice — make the handler idempotent. Answer 2xx first and do the work afterwards; a slow handler is treated as a failed delivery.

Read the result

Consume output only when state is succeeded. On failure, use errorCode, errorMessage and request_id to investigate. Example costs and states do not represent an actual bill.

Completed response example
{
  "code": 200,
  "msg": "success",
  "request_id": "req_example_record",
  "data": {
    "taskId": "job_01k3m8x9q2z4v7n5p6r8s0t1w3",
    "model": "openai/gpt-image-2.5-sunburst/text-to-image",
    "state": "succeeded",
    "output": {
      "assets": [
        {
          "key": "tasks/2026/08/28/job_01k3m8x9q2z4v7n5p6r8s0t1w3/3f7a1c9e5b2d48f0a6c1e3d5b7f9a1c3.png",
          "mime": "image/png",
          "url": "https://example.r2.cloudflarestorage.com/results/job_01k3m8x9q2z4v7n5p6r8s0t1w3/result.png?X-Amz-Signature=SIGNATURE_FROM_RESPONSE",
          "expiresAt": "2026-08-28T12:20:08.000Z"
        }
      ]
    },
    "cost": "0.750000",
    "settled": true,
    "createdAt": "2026-08-28T12:00:00Z",
    "completedAt": "2026-08-28T12:00:30Z"
  }
}

For each available asset, open or download assets[].url directly without an API Authorization header. The signed URL expires at expiresAt; poll the task again to refresh it while the asset remains within its retention period. A pending or unavailable asset has no URL. Treat signed URLs as private.

SDKs & integrations

Use SpicyAPI in your app, terminal, AI assistant or visual workflow. Choose a setup guide below.

SDKs
TypeScript · Python · Go · PHP · Java
CLI
Terminal commands and automation scripts.
MCP
Claude Code · Cursor · Codex
Agent Skill
Reusable instructions for your AI assistant.
n8n
Self-hosted community nodes and importable HTTP Request templates for n8n Cloud.
ComfyUI
Image, video and audio workflows on a node canvas.

More integrations

SillyTavernTelegram / DiscordApp proxyOpenAI SDKLangChainVercel AI SDK
Browse ready-to-use workflows

Use it in ComfyUI

Install the SpicyAPI nodes from ComfyUI Manager or with the command below, then search for GPT Image 2.5 Sunburst · Text to Image on the canvas. The node has the same options as this page and shows its price before it runs.

cd ComfyUI/custom_nodes
git clone https://github.com/spicyapi-ai/comfyui-spicyapi
Workflow examplesSetup guideSource on GitHub