Nano Banana 4
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Updated 6 min read

Getting Started with Nano Banana 4: A Complete Beginner's Guide

Everything you need to generate your first image with Nano Banana 4 β€” where to access it, how the interface works, and the five prompts every beginner should try.

Nano Banana 4 is the friendliest AI image model to learn, because you talk to it the way you would talk to a designer. This guide takes you from zero to your first great image in about ten minutes.

Where to access it

There are three official ways to use the model:

  1. The Gemini app (web at gemini.google.com, plus iOS and Android) β€” the easiest entry point. Pick the image generation option and type a prompt. A free tier is available with a daily generation limit.
  2. Google AI Studio β€” a more technical playground with control over model versions and settings. Also free to start.
  3. The Gemini API β€” for developers who want to build image generation into their own apps. Billed per generated image.

If this is your first time, start with the Gemini app. Everything in this guide works there.

Your first prompt

Type this into the prompt box:

A cozy reading nook by a rainy window, warm lamp light,
a sleeping cat on a knitted blanket, soft photorealistic style

Notice what makes this prompt work: it names a subject (reading nook, cat), a mood (cozy, rainy, warm), and a style (soft photorealistic). Those three ingredients β€” subject, mood, style β€” are the backbone of almost every good prompt.

The conversation is the interface

Here is the thing beginners miss: you don't need to get the prompt perfect on the first try. After the image appears, just keep talking:

  • "Make it nighttime instead"
  • "Add a cup of tea on the windowsill"
  • "Now in watercolor style"

Each follow-up edits the previous image rather than starting over. This iterative loop is where Nano Banana 4 beats older models β€” treat your first prompt as a rough draft, not a final answer.

Five prompts to try next

  1. A photorealistic product shot of an everyday object on your desk
  2. A portrait of yourself in a completely different era (upload a photo first)
  3. A children's book illustration of your pet as a hero
  4. A travel poster of your hometown in vintage style
  5. An isometric 3D miniature of your dream workspace

Common beginner mistakes

  • Prompts that are too short. "A dog" gives the model nothing to work with. Describe the breed, the setting, the light.
  • Prompts that are too long. A wall of twenty adjectives dilutes your intent. Aim for two to four sentences.
  • Ignoring aspect ratio. Say "vertical 9:16" for phone wallpapers and stories, "16:9" for thumbnails.
  • Restarting instead of editing. If the image is 80% right, ask for the 20% change instead of rewriting the whole prompt.

Where to go from here

Once you're comfortable, read our guide on writing better prompts, or grab a proven recipe from the prompt library and adapt it to your subject.