OpenAI Strikes Back Strongly! Does GPT-Image-1.5 Crush Nano Banana Pro Post-Launch? In-Depth Tests Reveal the Truth
In 2025, competition in the AI image generation field has reached a fever pitch, with the two giants OpenAI and Google leading the charge! You release yours, I release mine… So which one is the best to use? How to use it? How to access the API ? Less than a month after the release of Google’s Nano Banana Pro (Gemini 3 Pro Image model), OpenAI followed suit on December 16, 2025, with its latest image generation model GPT-Image-1.5. Both models offer better prompt following, precise editing, text rendering, and realism. This article will introduce the two models respectively, compare their effects, and provide a practical guide for API integration. GPT-Image-1.5 Introduction GPT-Image-1.5 is OpenAI’s flagship image generation model, integrated into the ChatGPT Images feature, free and open to all ChatGPT users, while also provided through the API for developers and enterprises. Main features: Speed improvement: Generation speed is 4 times faster than the previous generation (DALL-E 3 / ...