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

POST Base URL: https://api.hiapi.ai /v1/tasks

Image, video, and audio models are called through theUnified Async API POST /v1/tasks endpoint; only the input fields differ (see input parameters below).

Model summary

Model ID	gpt-image-2.5-sunburst/text-to-image
Mode	Text to image
Pricing	View live pricing

gpt-image-2.5-sunburst Text to image mode.

Production guidance

Calling notes

Put model at the top level and parameters inside input.
callback.url must be an http(s) terminal notification URL; when=final notifies on both success and failure.

Best suited for

Text to image

Call Text to image with gpt-image-2.5-sunburst/text-to-image.

promptaspect_ratioresolutionbackgroundoutput_format

Request parameters

POST https://api.hiapi.ai/v1/tasks

# Create an async task — returns taskId immediately (generation runs async)
# Replace YOUR_API_KEY with your account API key
curl -X POST "https://api.hiapi.ai/v1/tasks" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt-image-2.5-sunburst/text-to-image",
  "input": {
    "prompt": "Create a museum-grade square still-life photograph of a lacquer conservation studio and lunar cabinet.",
    "aspect_ratio": "auto",
    "background": "opaque",
    "resolution": "1K"
  }
}'

import requests, json

# Business params — fields vary by model (see the model page)
payload = json.loads(r'''
{
  "model": "gpt-image-2.5-sunburst/text-to-image",
  "input": {
    "prompt": "Create a museum-grade square still-life photograph of a lacquer conservation studio and lunar cabinet.",
    "aspect_ratio": "auto",
    "background": "opaque",
    "resolution": "1K"
  }
}
''')

# Create an async task — returns taskId immediately (generation runs async)
resp = requests.post(
    "https://api.hiapi.ai/v1/tasks",
    headers={"Authorization": "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
    json=payload,
)
print(resp.json())  # Returns { code, message, data: { taskId } }

// Create an async task — returns taskId immediately (generation runs async)
// Replace YOUR_API_KEY with your account API key
const resp = await fetch("https://api.hiapi.ai/v1/tasks", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
  "model": "gpt-image-2.5-sunburst/text-to-image",
  "input": {
    "prompt": "Create a museum-grade square still-life photograph of a lacquer conservation studio and lunar cabinet.",
    "aspect_ratio": "auto",
    "background": "opaque",
    "resolution": "1K"
  }
}),
});
console.log(await resp.json()); // Returns { code, message, data: { taskId } }

model string required

Use exactly gpt-image-2.5-sunburst/text-to-image.

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

input object required

Mode parameters.

prompt string required

Prompt length: 1-20,000 characters.

aspect_ratio enum optional

Output aspect ratio.

default auto enum: auto1:13:22:34:33:416:99:1621:927:1616:279:88:9

resolution enum optional

Output resolution. Price per output image: 1K $0.025, 2K $0.04, 4K $0.06 (default 1K).

default 1K enum: 1K2K4K

background enum optional

Optional background treatment: transparent, opaque, or auto; no default. transparent returns an image with an alpha channel at 1K, 2K, and 4K, and only supports png or webp; combining transparent with jpeg returns a 400. 1K transparent output may have slightly different dimensions from opaque output. For transparent output, describe an isolated subject with no backdrop, scenery, or shadow.

enum: transparentopaqueauto

output_format enum optional

Output image format: png, jpeg, or webp; defaults to PNG. Transparent backgrounds only support png or webp, and combining transparent with jpeg returns a 400. The fallback channel may return PNG.

default png enum: pngjpegwebp

callback object optional

Optional terminal-state callback.

url string required

http(s) URL that receives success or failure terminal notifications.

example https://your-domain.com/hiapi/callback

when enum optional

Notify when the task succeeds or fails.

default final enum: final

Example requests

Text to image example

Replace the prompt with your description; no reference image is needed for this mode.

Request body

{
  "model": "gpt-image-2.5-sunburst/text-to-image",
  "input": {
    "prompt": "Create a museum-grade square still-life photograph of a lacquer conservation studio and lunar cabinet.",
    "aspect_ratio": "auto",
    "background": "opaque",
    "resolution": "1K"
  }
}

Getting the result

Receive a taskId after submission.
Poll GET /v1/tasks/:id or wait for the terminal callback.
When status=success, download the image from data.output[].url before expireAt.
When status=fail, inspect data.error, correct the request, and resubmit.

FAQ

Where can I check pricing?

Use the live pricing page. https://www.hiapi.ai/en/pricing?source=docs&model=gpt-image-2.5-sunburst%2Ftext-to-image&placement=pricing-reference#model-pricing

Next steps

View live pricing