OpenAI ships ChatGPT Images 2.5 with faster generation and a Sketch input

OpenAI announced ChatGPT Images 2.5 on September 8–9 as a direct successor to the April 2.0 release. The headline improvements are speed — up to 50% faster generation — and fidelity, with more natural lighting, richer textures, and improved instruction-following across multi-turn edits. The standout new capability is 'Sketch,' which lets users draw on a touchscreen and feed that drawing in as a compositional reference, giving finer control over layout and subject placement. OpenAI also emphasized better preservation of details from reference photos and stronger consistency during iterative edits in complex scenes.

The launch was messy in one respect: it landed alongside a ChatGPT outage that BleepingComputer reported caused image-generation errors and file-upload processing failures, with some uploads appearing complete but remaining unavailable. That undercut the 'faster and smoother' messaging for some users on day one.

Competitively, Images 2.5 targets the same ground as Google's Gemini image tools and the open-weight surge around Qwen-based image prompting (r/StableDiffusion's 'Krea 2 + qwen 3.8 prompter' workflow drew 816 upvotes). Designers on Hacker News (275 points, 369 comments) debated whether the lighting and texture jump is meaningful or incremental. For a professional workflow, the reference-preservation and multi-turn-edit gains matter more than raw generation speed, and those are the claims worth verifying against real assets. The Sketch feature, if it works as described on tablets and phones, is the most differentiated addition — turning rough hand drawings into a controllable input is something rivals have handled awkwardly. Watch for independent side-by-sides now that the tool is broadly available.