GPT Image 2.5 Sunburst API

Introduction

GPT Image 2.5 Sunburst Text to image is OpenAI's gpt-image-2.5-sunburst, released on 8 September 2026, generating images from a written prompt.

Choose a mode by starting material

Key features

OpenAI's quality-first 2.5 model

OpenAI describes Sunburst as the model for workflows where editing precision matters most, and pairs it with Flare for speed.

Five quality tiers

Low and medium for drafts, high as the default, xhigh and max for finals.

Request parameters

Pricing

Prices are in credits, the same credits you use on the website (1 credit = $0.01). The hold is taken when the task is accepted and settled to the actual charge when it finishes; failed tasks are refunded.

Each task is rounded up to whole credits, so one run at the lowest tier costs 1 credit per image ($0.01).

For an exact number before you run, send the same body to POST /jobs/quote.

Use cases

Key visuals and hero shots

Images that will be viewed full screen or printed large, where max quality keeps satin folds, hair and reflections clean at 4k.

Product shots with glass and metal

Perfume bottles, jewellery and watches, where reflections and small engraved text need the xhigh or max tier to stay crisp.

Portraits and fashion stills

Single-light portraits and evening-wear editorials where material detail carries the picture more than the composition does.

Prompt guide & pro tips

Name materials and light

Satin, velvet, lace, polished parquet, candle flames: concrete materials and a stated light direction give the higher tiers something to render.

Save xhigh and max for finals

Settle the composition at medium or high, then run the same prompt once at max.

Pick the publishing ratio first

Choose the ratio of the placement first, then the size tier.

API quick start

Call the GPT Image 2.5 Sunburst API in three steps

1. Create an API key. Sign in to PopNow and create a key in the API console. Keys start with sk-popnow- and use the same credits as the website.
2. Send the request. POST /jobs/createTask with model openai/gpt-image-2.5-sunburst/text-to-image and an input object that follows the parameter table. The response returns a task ID straight away.
3. Get the result. Poll GET /jobs/recordInfo with the task ID, or pass a callBackUrl and we post the result to it. Download the output links when the task succeeds.

# 1. Create the task. Keep the Idempotency-Key if you retry after a network error.
export IDEMPOTENCY_KEY="$(uuidgen)"
curl -X POST https://api.popnow.ai/api/v1/jobs/createTask \
  -H "Authorization: Bearer $POPNOW_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $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",
    "aspect_ratio": "1:1",
    "resolution": "1k",
    "quality": "high",
    "num_outputs": 1,
    "output_format": "png"
  }
}'

# 2. Copy data.taskId from the response, then poll until state is succeeded, failed, canceled or expired.
TASK_ID="TASK_ID_FROM_RESPONSE"
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=$TASK_ID" \
  -H "Authorization: Bearer $POPNOW_API_KEY"

Replace the prompt and any links with your own. The API tab has the response, polling and callback reference.

GPT Image 2.5 Sunburst API questions

All GPT Image models

GPT Image 2.5 Flare has the same options and price per image but is tuned for speed and usually finishes sooner. Sunburst is the one for final images and precise edits.

• GPT Image 2.5 Sunburst APIOpenAI's quality-first model, up to 4K with clean textFrom 1 credit per image
• GPT Image 2.5 Flare APIOpenAI's speed-first model with masked edits and cut-outsFrom 1 credit per image
• GPT Image 2 APILegible in-image text and precise masked editsFrom 1 credit per image

Other image APIs

• Nano Banana 2.1 APIGoogle's newest Nano Banana, sharp text and 4K outputFrom 8 credits per image
• Nano Banana Pro APIPlans the layout first: dense text, diagrams and 4K editsFrom 17 credits per image
• Seedream 5.0 Pro APIHigh-detail images and edits from up to ten referencesFrom 6 credits per image
• FLUX.2 Max APITop-tier FLUX: photoreal light and exact brand colorsFrom 11 credits per image
• Qwen Image 2.1 Pro APIUp to six detailed 2K images from one promptFrom 6 credits per image
• Qwen Image 2.1 Turbo APIFast 8-step renders, up to six per promptFrom 3 credits per image

More about GPT Image 2.5 Sunburst

Try it

GPT Image 2.5 Sunburst AI Image Generator onlineCreate images with GPT Image 2.5 Sunburst in PopNow

Compare

Nano Banana 2.1 vs GPT Image 2.5 Sunburst

Docs

GPT Image 2.5 Sunburst model ID and input schema in the API docsPopNow API quickstart: your first request in five minutesImage generation guide for the PopNow APIWebhooks: get GPT Image 2.5 Sunburst results without polling