GPT Image 2.5 Sunburst (max)

GPT Image 2.5 Sunburst is an advanced image generation and editing model developed by OpenAI, released on September 8, 2026. Designed as the high-precision variant within the GPT Image 2.5 series, Sunburst is built for intricate visual workflows where editing accuracy, detail preservation, and faithful multi-turn reference handling take precedence over generation speed. The model supports high-resolution outputs up to 4K dimensions, multiple aspect ratios, and customizable quality tiers including xhigh and max. It accommodates text-to-image generation as well as sophisticated image-to-image editing tasks, accepting up to 16 reference images to maintain identity, style, and composition consistency across turns, alongside support for transparent backgrounds and granular controls like markup-guided edits. When utilizing GPT Image 2.5 Sunburst, users are advised to begin with standard quality settings before stepping up to resource-intensive tiers like xhigh or max only when intricate details, text legibility, or complex layout requirements demand it, with access available through both the dedicated Image API and the Responses API.