GPT Image 2.5 Sunburst and Flare

About

GPT Image 2.5 is OpenAI’s newest image family, available through the same Sogni key as every other model. It comes in two sizes. Sunburst is OpenAI’s quality-first model, which OpenAI rates above GPT Image 2 for image quality. Flare is the smaller, faster model, with image quality OpenAI rates comparable to GPT Image 2.

Both add three things GPT Image 2 does not have: two higher quality settings, Extra high and Maximum; a transparent background, which returns a cut-out as PNG or WebP; and an edit mask — a PNG with transparency, the same size as your first reference image — that confines the change to the area you mark. Like GPT Image 2, they take up to sixteen reference images and render text well.

As partner models they run on OpenAI’s infrastructure rather than Supernet GPU workers and are billed in Premium Spark only. Sogni quotes each job before it runs, and the final charge follows the output tokens OpenAI reports, so quality, size and references move the price. GPT Image 2 stays available, unchanged.

Two models, one family

Sunburst and Flare take the same inputs and settings, and Sogni quotes the same request at the same price on either. Choose Sunburst for the best result and Flare when speed matters more.

Pricing

GPT Image 2.5 is a pay-as-you-go Premium Spark vendor model. Every render uses purchased Spark, including for Sogni Unlimited members. Unlimited saves 5%; Unlimited Pro saves 10%.

Premium Spark required — purchased credits; free Spark does not apply.

In the app, low, medium and high are called Fast, HQ and Pro; GPT Image 2.5 adds Extra high (xhigh) and Maximum (max).

Pricing is token-based: the quote comes first, and the charge follows the output tokens OpenAI reports. Reference images add input-token cost.

API

One Sogni API key reaches every model in the catalog — call GPT Image 2.5 with the exact model id for the variant you want.

import { SogniClient } from '@sogni-ai/sogni-client';

const client = await SogniClient.createInstance({
  appId: crypto.randomUUID(),
  apiKey: process.env.SOGNI_API_KEY,
  network: 'fast',
});

const project = await client.projects.create({
  type: 'image',
  modelId: 'gpt-image-2.5-sunburst',
  positivePrompt: 'a slothicorn surfing a wave of liquid paint, studio lighting',
  numberOfMedia: 1,
});

const [url] = await project.waitForCompletion();
console.log(url); // result link — download within 24h

curl https://api.sogni.ai/v1/creative-agent/workflows \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $SOGNI_API_KEY" \
  -d '{
    "input": {
      "title": "First render",
      "steps": [{
        "id": "step1",
        "toolName": "generate_image",
        "arguments": { "prompt": "a slothicorn surfing a wave of liquid paint, studio lighting", "model": "gpt-image-2.5-sunburst" }
      }]
    },
    "confirm_cost": true
  }'

Example uses gpt-image-2.5-sunburst. Use any exact model id from the Variants table above. Full reference at docs.sogni.ai.