> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bettertoken.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# GPT Image 2.5 is available: Flare and Sunburst

> Compare GPT Image 2.5 Flare and Sunburst for image generation and editing, with BetterToken model IDs and API setup.

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 <a href={"https://bettertoken.ai/pricing"}>model plaza</a>. 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.

<Note>
  These are OpenAI capabilities. For parameters supported by BetterToken, follow the [image generation](/en/api-reference/images-generations) and [image editing](/en/api-reference/images-edits) documentation. Sketch, templates, and image comments in ChatGPT are client features, not image API parameters.
</Note>

## 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`.

```bash theme={null}
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](/en/api-reference/images-generations) 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](/en/api-reference/images-edits) 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](https://openai.com/index/introducing-chatgpt-images-2-5/)
* [GPT Image 2.5 Flare model reference](https://developers.openai.com/api/docs/models/gpt-image-2.5-flare)
* [GPT Image 2.5 Sunburst model reference](https://developers.openai.com/api/docs/models/gpt-image-2.5-sunburst)
* [OpenAI image generation guide](https://developers.openai.com/api/docs/guides/image-generation)