GPT Image 2.5 Sunburst

GPT Image 2.5 Sunburst is listed in OpenAI's model reference as `gpt-image-2.5-sunburst` and described there, in OpenAI's own words, as "our most capable model for image generation and editing". It is the upper half of a two-model release: Sunburst for capability, Flare for speed and everyday use. OpenAI's model reference carries no release date and no pricing for either model; the 8 September 2026 date recorded here comes from the LLM Gateway release timeline rather than from OpenAI, which is a weaker source than the rest of this batch and is flagged as such. No benchmark results are recorded, because none were published on a fetchable page.