I tried Google’s ‘nano banana’ AI image editor that topped LMArena

A mystery AI image editor named “nano banana” recently rose to the top of LMArena, the most popular AI leaderboard. The model easily bested its opponents in the arena, which lets users test AI models head-to-head. Now, Google DeepMind has revealed that nano banana is actually the alias for Gemini 2.5 Flash Image.

Before the big reveal, Googlers did drop some hints:

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Now that the model has been officially rolled out, Google DeepMind said that Gemini will be better at editing your images. Products like this move us a step closer to a post-Photoshop world. Instead of learning the technical ins and outs of photo editing software, which can take years to master, AI image editors will make it possible for anyone to edit an image with just a few simple voice or text prompts — in theory.

The Google DeepMind team says this model has been trained to make subjects more consistent across various edits of AI-generated images. This has been an issue for AI image models, given their unpredictable nature. I tried out the new “nano banana” model for myself, and it worked… fine.

The ability to upload and natively edit photos in Gemini has been around since April of this year. With Gemini’s updated model, Google says you can do things like change a subject’s outfit and location, while keeping their likeness the same.

You can also upload multiple photos and have the subjects appear together in the same photo, or add and alter specific details in an uploaded image to, say, see what a room looks like with a different color of paint or different furniture.

Here’s Gemini’s attempt at editing my dog into the downward dog pose and relocating her to a yoga studio. Her likeness is the same, and it successfully edited the image to make her eyes open, but her body isn’t arched in the way it should be. (I would know, I’ve seen this playful pose from her many times.)

Here’s my dog Lola, not doing yoga
Credit: Mashable

Here’s the Gemini-edited version when I prompted it to open her eyes, put her in the downward dog pose, and change the background to a yoga studio. It’s close, but not quite right.
Credit: Mashable

As Google DeepMind said in its announcement, the model might not always get it right. There might still be inaccuracies with fine details, text in the image, and inconsistencies. With my experiment, my dog’s fur looks overly smooth, but her overall coloring, size, and shape stay the same. All images have a visible watermark and an invisible watermark called SynthID to mitigate any confusion over whether they’re real or AI-generated. This update is now live, so you can try it out for yourself in the Gemini app.