GPT Image 2.5 Sunburst is OpenAI's image generation and editing model, released 2026-09 as the precision-oriented tier of the GPT Image 2.5 series. It targets detailed creative work where editing accuracy matters more than generation speed.
Modalities
inTextinImageoutImage
Price / 1M
$3.50 / $21.00
Context
400K
Released
Sep 9, 2026
Channels
Every channel serves the same model, but they differ in price and stability. On each API key in the Platform, you pick a primary and a backup channel per vendor, and each billing line shows which channel served the request.
Provider
Discount
Input /M
Output /M
Cache read /M
Cache write 5m /M
Cache write 1h /M
Defaultstable
+53%
$3.50
$21.00
$0.88
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Capabilities
VisionLong contextPrompt cachingStructured output
Parameters
Request parameters this model accepts through the API.
max_tokensresponse_formatseedstructured_outputs
Quick start
POST /v1/images/generations/import os from openai import OpenAI client = OpenAI( base_url="https://api.mirapi.ai/v1", # changed api_key=os.environ["MIRAPI_API_KEY"], # changed ) img = client.images.generate( model="gpt-image-2.5-sunburst", prompt="A red bicycle leaning on a white wall", n=1, size="1024x1024", ) # img.data[0].b64_json — or .url, depending on the model
import OpenAI from "openai"; const client = new OpenAI({ baseURL: "https://api.mirapi.ai/v1", // changed apiKey: process.env.MIRAPI_API_KEY, // changed }); const img = await client.images.generate({ model: "gpt-image-2.5-sunburst", prompt: "A red bicycle leaning on a white wall", n: 1, size: "1024x1024", });
curl https://api.mirapi.ai/v1/images/generations/ \ -H "Authorization: Bearer $MIRAPI_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "gpt-image-2.5-sunburst", "prompt": "A red bicycle leaning on a white wall", "n": 1, "size": "1024x1024" }'
Links
Wire GPT Image 2.5 Sunburst into your product
Start free1M free tokens to start, no card required. It’s OpenAI-compatible, so you only change the base URL.