Google has updated its Gemini AI image generation tool with a build that caused a stir after it was released under the code name Nano Bananas.

The upgrade, technically called Gemini 2.5 Flash Image, lets users generate images through voice and text prompts, including swapping out participants in a photo, changing what they are wearing, or merging people from real images with new backgrounds. Google formally released it on Tuesday, though only via the Gemini mobile app, with the web version not getting all the new capabilities yet.

We've been testing the new engine and the results are impressive. For example, Reg US Editor Avram Piltch took a photo of just his torso and a separate photo of two chairs. When he uploaded both photos to Gemini on his phone, he asked the engine to draw him sea

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