OpenAI's ChatGPT Images 2.5 adds Sketch: users draw doodles to steer image composition

OpenAI announced ChatGPT Images 2.5 on September 8, 2026. The headline addition is Sketch: typing @Sketch opens a drawing canvas inside ChatGPT, and the user's doodle serves as a compositional reference alongside the text prompt. It shifts image generation from text-only input toward hybrid text-plus-visual control. Available now on desktop, mobile, and web.