OpenAI released ChatGPT Images 2.5: image generation latency reduced by 50%, with new features for converting sketches to images and region editing.

OpenAI released the latest AI image generation model, ChatGPT Images 2.5, on September 8, 2026. This version features significant performance improvements: image generation latency has been reduced by up to 50%, and there have been enhancements in detail sharpness, natural lighting, and texture richness. Newly added is the Sketch drawing function, allowing users to convert hand-drawn sketches into detailed images using the “@Sketch” command along with descriptions. Additionally, libraries of creative templates for posters and products have been introduced to lower the threshold of use. Multiple editing options such as region annotation, deletion, or color change are supported after image generation, and original prompts are included when sharing. Two models are available through the API: GPT-Image-2.5 Flare for batch generation scenarios, and GPT-Image-2.5 Sunburst for high-editing-control requirements but with longer processing times.