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「Nano Banana 2」と「ChatGPT Images 2.0」

13/5/2026

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2026年2月26日にGoogleから発表された「Nano Banana 2(正式名称:Gemini 3.1 Flash Image)」と2026年4月21日にOpenAIからリリースされた「ChatGPT Images 2.0」は、
どちらも非常に優れた画像生成AIです。
2025年11月にNano Banana pro がリリースされたときは、出力革命とまで言われましたが、あっという間にOpenAIが追い付き、追い抜いたかもしれない状況になっています。
この両者について、生成AIに、強み、弱み、用途別の使い分けを調べさせました。なお、生成AIによる調査・分析結果は、公開された情報からだけの分析であり、必ずしも実情を示したものではないこと、誤った情報も含まれていることについてはご留意されたうえで、ご参照ください。
 
ChatGPTの画像生成AIは本当に最強か Nano Bananaと比べて見えた“弱点”
5/11(月)
https://news.yahoo.co.jp/articles/9d6e66515e2562f965b67231c166a32669fd0ca2
 
“Nano Banana 2” and “ChatGPT Images 2.0”
“Nano Banana 2” (officially named Gemini 3.1 Flash Image), announced by Google on February 26, 2026, and “ChatGPT Images 2.0,” released by OpenAI on April 21, 2026, are both extremely capable image generation AIs.
When Nano Banana Pro was released in November 2025, it was even described as an “output revolution.” However, OpenAI appears to have caught up — and perhaps even surpassed it — in a remarkably short period of time.
I asked generative AI to investigate and compare the strengths, weaknesses, and best use cases for each of these two systems. Please note that the research and analysis generated by AI are based solely on publicly available information, may not necessarily reflect the actual situation, and may contain inaccuracies.

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