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Nano Banana 2.1 vs GPT Image 2.5: 8 Prompts, Real Cost per Image

Nano Banana 2.1 (Google) and GPT Image 2.5 (OpenAI) are the two newest AI image models. On 8 October 2026 I gave them, plus Nano Banana 2, Nano Banana Pro and both GPT Image 2.5 versions (Sunburst and Flare), the same 8 prompts and kept the first picture only. Nano Banana 2.1 cost me $0.0418 a pict…

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  1. 2026-10-11 21:19 · DEV Community — Machine Learning
    Nano Banana 2.1 vs GPT Image 2.5: 8 Prompts, Real Cost per Image

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