Nano Banana
The viral Google image model that turned everyone into a photo editor.
Nano Banana is the codename that stuck for Google's Gemini-family image model — the one that went viral in 2025 for keeping the same face, outfit and lighting across edits, when every other model would quietly swap your character for a stranger. It generates images from text, but its real superpower is conversational editing: upload a photo, say 'put me on a 1970s spy movie poster', and it does exactly that while you still look like you.
Character consistency is where it beats almost everything else. Choose Nano Banana over Imagen 3 when you are editing existing images, building a series around one character, or blending several reference photos into a single coherent scene. Choose Imagen 3 instead when you want maximum photorealistic detail from a pure text prompt with no reference images involved.
It is not flawless: very busy scenes with many characters can drift, native output resolution is capped below what dedicated upscalers deliver, and every image carries Google's invisible SynthID watermark. In VAR2 you can generate with Nano Banana and then run the result through upscaling in the same flow, which neatly covers the resolution gap.
Strengths
- Best-in-class character consistency across edits
- Conversational, instruction-based editing of real photos
- Blends multiple reference images into one coherent scene
- Fast generations at a low token cost
Best for
- Editing personal photos with natural-language instructions
- Character series and brand mascots that must stay consistent
- Meme-speed social content and product mockups
Prompt tips
- Talk to it like an editor: 'change the background to X, keep the face and pose exact' beats keyword soup
- Say explicitly what must NOT change — consistency is opt-in, so name the face, outfit and lighting you want locked
- For multi-image blends, describe each input's role: 'use the outfit from image 1 on the person in image 2'
Sample prompt
Edit this photo: place the subject inside a cozy Tel Aviv coffee shop at golden hour, keep their face, hairstyle and expression exactly the same, add soft window light from the left, photorealistic.