ChatGPT Images 2.5 and Nano Banana 2 Face a Six-Category Image Test

OpenAI’s ChatGPT Images 2.5 is being compared with Google’s Nano Banana 2 in a review examining how the two image-generation models perform across six categories. The test focuses on the capabilities OpenAI highlights for its new model, including sharper detail and more precise editing. Decrypt conducted the comparison to assess how those claims translate into practical results against Google’s competing system. The review is centered on image quality and editing performance rather than financial-market data, making it relevant primarily as a technology development for users tracking generative AI platforms. The report does not establish a universal winner in the supplied material, but frames the comparison around the strengths and trade-offs revealed by the six-category test. The article was published on September 12, 2026.