GPT Image 2 and Nanobanana 2 for real workflows
GPT Image 2 is provided by OpenAI and emphasizes up to 4k and flexible ratios. Nanobanana 2, from Google, emphasizes high quality and text in images. The stronger option depends on the input, output constraints, and review standard.
How to test GPT Image 2 vs Nanobanana 2
Run the same prompt, source context, output format, and acceptance criteria through both models. Score accuracy, instruction following, edit time, latency, and current cost separately. Repeat the test on several representative tasks before standardizing on either model.