Mark the spot you want changed instead of writing another prompt: per Axios, the update adds tools for basing generations and edits on sketches and for visually indicating where changes should be made. OpenAI says ChatGPT Images 2.5 turns ideas, sketches and reference photos into more personalized, polished images, and generates them up to 50% faster than its predecessor.
Axios reported that in early testing the updated image engine better preserved the likeness of people and pets and supported more detailed editing.