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openai/gpt-image-2.5-sunburst/text-to-image
GPT Image 2.5 Sunburst Text-to-Image
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GPT Image 2.5 Sunburst Text-to-Image API by OpenAI

openai/gpt-image-2.5-sunburst/text-to-image
Text-to-image

GPT Image 2.5 Sunburst generates images from natural-language prompts with arbitrary resolutions up to 3840x2160, five quality tiers including xhigh and max, and first-class transparent backgrounds. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.

模型對比

GPT Image 2.5 Sunburst Text-to-Image 由 OpenAI 開發。Atlas Cloud(由 Atlas Cloud AI LLC 營運)僅提供接取服務,並不擁有該模型。所有商標均歸其各自所有者所有。

GPT Image 2.5 Sunburst Text-to-Image

GPT Image 2.5 Sunburst is OpenAI's upgraded GPT Image generation model, reached through the OpenAI Images API. Generation is asynchronous: submit the request, then poll for the final image URL.

Highlights

  • Five quality tiers: low, medium, high, plus xhigh and max, which are new in gpt-image-2.5.
  • Arbitrary resolutions: any WIDTHxHEIGHT up to 3840x2160, at any aspect ratio between 1:3 and 3:1.
  • Transparent backgrounds: fully supported, not preview, on gpt-image-2.5.
  • Long prompts: up to 32000 characters.

Parameters

ParameterRequiredDescription
modelYesopenai/gpt-image-2.5-sunburst/text-to-image
promptYesText description of the desired image. Up to 32000 characters.
qualityNoRendering tier: low, medium, high, xhigh, max. Defaults to medium. xhigh and max are new in gpt-image-2.5.
sizeNoOutput size as WIDTHxHEIGHT (for example 1536x864) or auto. Defaults to 1024x1024. The only control over output dimensions.
backgroundNoauto, opaque, or transparent. transparent forces a png or webp output format.
output_formatNopng, jpeg, or webp. Defaults to png.
nNoNumber of images to generate, 1 to 10. Defaults to 1. Each image is billed separately.

How To Use

curl -X POST "https://api.atlascloud.ai/api/v1/model/generateImage" \ -H "Authorization: Bearer $AIP_API_KEY" \ -H "Content-Type: application/json" \ --data-raw '{ "model": "openai/gpt-image-2.5-sunburst/text-to-image", "prompt": "A cute baby sea otter floating on its back in golden evening light.", "quality": "high", "size": "1536x864", "output_format": "png" }'

Size

size is the only control over output dimensions. gpt-image-2.5 accepts arbitrary resolutions, subject to:

  • both edges at least 256 px, floored to a multiple of 16
  • each edge at most 3840 px, and at most 3840x2160 in total
  • aspect ratio between 1:3 and 3:1

Resolutions above 2560x1440 are experimental upstream. auto lets the model choose, and is billed at the auto ceiling then settled down against the image actually produced.

Notes

  • Generation is asynchronous. Submit the request, then poll /api/v1/model/prediction/{request_id} for the final image URL.
  • Pricing is per token, at OpenAI's list rates: image tokens 8.00/1Minand8.00/1M in and 30.00/1M out, text input 5.00/1M(cachedinput5.00/1M (cached input 2.00/1M and $1.25/1M respectively). The request is charged from the token usage the model actually reports, so the amount held at submit is an upper bound and the difference is refunded.
  • Streaming (stream, partial_images) and response_format are not supported — the API always returns finished images re-hosted on AtlasCloud storage.

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