Comparing ChatGPT Images vs Nano Banana Pro Across Key Scenarios

This walkthrough compares ChatGPT’s image model with Nano Banana Pro across multiple use cases. You’ll also learn how to create a reusable comparison framework for evaluating AI models.

We also tested Nano Banana Pro through Google AI Studio to see if it performs better than the standard version.

Tip: If you don’t have Gemini Pro, Nano Banana Pro can often be accessed for free. Try using an incognito browser if needed.

Who It’s For

• Business owners creating marketing assets
• Designers using AI-generated visuals
• Anyone looking to improve AI image outputs

What You’ll Create

A structured comparison matrix to evaluate image models

Requirements

• Gemini Pro account
• Free or paid ChatGPT account
• (Optional) Google Workspace account with AI Studio billing enabled
• (Optional) A Notion template for your scoring system

Step 1: Define Your Use Cases

Select a set of test scenarios. Example set:

• Logo for a taco truck
• Website graphic for a furniture brand
• Social post for an energy drink
• Travel agency marketing asset
• A detailed prompt where realism is easy to judge

Set clear evaluation rules:

• Use identical prompts for each model
• Generate 4 images per test
• Score on:
• Consistency (prompt accuracy)
• Creativity (variation quality)
• Utility (practical usability)
• Quality (realism vs. AI artifacts)

Step 2: Generate Prompts

Use an AI tool like Claude, ChatGPT, or Gemini to create structured prompts.

Example instruction:

“Create JSON prompts for these use cases. Invent unique brands and include instructions to generate four variations in a grid.”

Tip: Request a 4×4 grid output to reduce time and token usage.

Step 3: Build a Scoring Matrix

Create a table like this:

You can replicate this in tools like Notion for easy reuse.

Step 4: Access the Tools

• Open Gemini and select “Create image” to use Nano Banana
• Visit ChatGPT’s image generation interface
• (Optional) Use AI Studio’s Playground to test Nano Banana Pro

Step 5: Run and Evaluate Tests

Input each prompt into each tool and generate outputs.

Start a new session per use case to avoid context overlap.

Score results using your defined criteria.

Going Further

Test these workflows with your own brand:

• Ask ChatGPT or Gemini to interview you (3–5 questions)
• Use responses to generate tailored prompts
• Compare outputs and refine

For best results, generate multiple variations in a grid, then isolate and refine the strongest option.