GPT Image 2.5 Image Generator is a free online AI image generation tool, based on the GPT Image 2.5 image generation and editing model family released by OpenAI on September 8, 2026. It is called ChatGPT Images 2.5 in the ChatGPT app and gpt-image-2.5 in the API.
Purpose This tool is used to generate and edit images through text prompts, and is suitable for scenarios that require fast image output, precise editing, multiple rounds of revision, and the need to confirm the actual model version in use. It emphasizes "telling you which image was generated by which model," indicating the model actually running through a receipt below the result.
Main capabilities
- Dual-model switching: Flare and Sunburst. Flare is the fast default model, with latency up to 50% lower than GPT Image 2, suitable for social posts, drafts, batch generation, and tasks requiring repeated iteration; Sunburst has higher image quality than GPT Image 2, and is the only one of the two for which OpenAI claims quality surpassing GPT Image 2, suitable for campaign concepts, product retouching, and long editing chains. Both are priced the same per image on this site, with Sunburst taking about seven seconds longer to wait.
- Precise single-element editing: supports precise modification of a single element in an image.
- Multi-round editing: subsequent edits preserve the results of previous edits.
- Reference consistency: faces and products can remain consistent across multiple images.
- Quality levels: provides two quality levels above high, xhigh and max.
- Resolution: supports up to 3840×2160 native 4K.
- Price reference: Standard 1K is $0.0132 per image, the same for both models; API starts at $0.0059.
- Text rendering capability: examples demonstrate its text and layout performance in scenarios such as poster headlines, multilingual text, infographics, UI mockups, comics, textbook pages, stamps, and travel posters.
How to use No installation or registration is required to use it in a browser. Enter a prompt in the generator at the top of the page, choose Flare or Sunburst, and click generate. The first image is free, at 1024×1024, Standard quality, with a small watermark, and only requires an email address. After registering, the free quota becomes a credit balance, the watermark is removed, daily check-ins earn more credits, and history can be deleted. Failed, timed-out, and moderation-blocked runs are not billed.
Applicable scenarios
- Social posts, drafts, batch generation, and iterative tasks (Flare)
- Campaign concepts, product retouching, long editing chains (Sunburst)
- Tasks requiring precise single-element editing, multi-round editing, and character or product consistency
- Scenarios requiring high-resolution output (up to 4K)
- Scenarios requiring complex text rendering such as in-image text layout, multilingual text, infographics, UI mockups, comics, and textbook pages
Limitations
- Flare and Sunburst are separate models in the API; there is no model selector inside ChatGPT and Codex, and it is impossible to know which one is actually running.
- This tool is an independent interface to the OpenAI API, not a free ChatGPT account.
- The free first image has a watermark, which is removed after registration.
- Specific daily credit quotas, check-in rules, failure billing details, etc. are subject to the explanation on the free page.
- Some example images come from the open-source awesome-gpt-image-2.5-prompts index and were not generated by this site.
