GPT Image 2.5 is available: Flare and Sunburst

Updated: 2026-09-10

OpenAI released ChatGPT Images 2.5 on 2026-09-08 with two API models: GPT Image 2.5 Flare and GPT Image 2.5 Sunburst. Both are listed in the BetterToken model plaza. Check it for current availability and pricing.

Choose a model

Model	Full model ID	Best suited to
GPT Image 2.5 Flare	gpt-image-2.5-flare	Fast generation, social content, visual drafts, and everyday image editing.
GPT Image 2.5 Sunburst	gpt-image-2.5-sunburst	Product images, brand assets, and final artwork that need closer detail preservation and editing precision.

Both accept text and image inputs and produce images. Start with Flare for everyday tasks; compare Sunburst when you need repeated, precise edits to the same asset. Use the full model ID in the table, not just gpt-image-2.5.

What changed

• Faster generation: OpenAI reports 50% lower generation latency for Flare than GPT Image 2. Actual time also depends on size, quality, and service load.
• More precise editing: Better preservation of reference subjects, composition, and details you did not ask to change, including across multiple edits.
• Visual and layout improvements: Better lighting, textures, style adherence, and handling of complex visual instructions. Review text and factual details before using a finished image.

New options in the official API

OpenAI’s image API offers these options for both models:

• quality accepts low, medium, high, xhigh, max, and auto.
• For a transparent background, use background: "transparent" with output_format: "png" or "webp".
• Custom dimensions are supported. Width and height must be multiples of 16, the aspect ratio must be between 1:3 and 3:1, neither edge may exceed 3840 pixels, and total pixels must be between 655,360 and 8,294,400. Output above 2560x1440 is experimental.

These are OpenAI capabilities. For parameters supported by BetterToken, follow the image generation and image editing documentation. Sketch, templates, and image comments in ChatGPT are client features, not image API parameters.

Connect through BetterToken

Create a BetterToken API Key with access to the model and use these settings:

Setting	Value
Base URL	https://bettertoken.ai/v1
Authentication	Authorization: Bearer YOUR_API_KEY
Image generation	POST /v1/images/generations
Image editing	POST /v1/images/edits

Generate an image

This example uses Flare. To use Sunburst, replace model with gpt-image-2.5-sunburst.

curl --fail-with-body --max-time 300 "https://bettertoken.ai/v1/images/generations" \
  -H "Authorization: Bearer $BETTERTOKEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-image-2.5-flare",
    "prompt": "A product photo of a green ceramic mug on a white studio table",
    "size": "1024x1024",
    "n": 1,
    "response_format": "b64_json",
    "output_format": "png"
  }'

The image endpoint waits for generation to finish, then returns image content in data[0].b64_json. Check that the request succeeded before decoding and saving it. See image generation for a complete saving example.

To edit an image, send multipart/form-data to POST /v1/images/edits, use the same full model ID, and upload a reference with image. See image editing for examples.

Integration tips

• Start with n: 1, output_format: "png", and response_format: "b64_json" before adjusting other parameters.
• Allow several minutes for image generation. After changing models, compare actual latency, output dimensions, and editing results.
• OpenAI charges by tokens. Check the model plaza for BetterToken billing and prices instead of applying official estimates directly.

Official sources

• ChatGPT Images 2.5 announcement
• GPT Image 2.5 Flare model reference
• GPT Image 2.5 Sunburst model reference
• OpenAI image generation guide