Why creators compare these tools
GPT Image 1.5 and Nano Banana Pro are often compared because, on the face of it, they seem pretty similar as generation tools, but they solve different problems. One’s built for fast ideas and exploration, while the other is built for images that need to stay clear, consistent, and usable in real projects.
Both GPT Image 1.5 and Nano Banana Pro are solid image generation tools, but each one has its own different strengths and best uses.
What GPT Image 1.5 is built for
GPT Image 1.5 is designed for creating quick visuals when you want to see an idea, but not perfect it yet. You describe a concept, generate an image, either tweak and regenerate, or continue to use it.
This makes it really useful for early-stage work. Think mood boards, visual brainstorming, rough illustrations, or testing a look before you invest more time.
It also fits naturally if you already use ChatGPT (Image 1.5 works directly in ChatGPT) for writing, planning, or ideation, as staying in the same chat helps you build on your current ideas without moving between tabs or platforms.
But when you need your image to do more than just be a placeholder or to be used later for something more final, things can get tricky. Text inside images often comes out wrong or inconsistent, layouts move around between generations, and small prompt changes can lead to very different results.
Inside Artlist, GPT Image 1.5 is available in Low, Medium, and High quality modes. Higher modes will give you more detailed and polished images, but they don’t change how the model handles layout, text, or consistency. It’s also important to note that even at higher quality, results can still vary between generations.
What Nano Banana Pro is built for
Nano Banana Pro creates much more predictable, even almost final images.
This model is designed for when an image needs to follow clear direction. Using your text prompt or reference images, you’re defining what should appear, where it sits, and how it repeats across frames.
Text is a good example. Nano Banana Pro handles words inside images with much more accuracy, which matters when visuals include headlines, labels, UI elements, or brand messaging that has to be readable.
Prompt: A 3-panel comic strip about a female office worker in her mid-50s, deciding what to order for lunch. Include thought bubbles and speech bubbles.
Consistency is where the difference becomes obvious. Characters, objects, and layouts hold together across multiple generations, which makes the images usable in sequences, not just as one-offs.
Instead of regenerating and hoping for a close match, you refine a direction and build on it, knowing the next image won’t break the theme.
GPT Image 1.5 vs Nano Banana Pro: a comparison
Image quality and style control
GPT Image 1.5 can create good-looking images, but the consistency often changes between generations. Lighting, framing, or colors may shift even when the prompt stays similar.
Nano Banana Pro keeps the look more stable. When you describe how the image should appear, the results usually stay closer to that direction across multiple images.
Prompt: A set of 4 images of a husky puppy with bright blue eyes in a different position in each image, staring at the camera from behind a window. POV of the person looking through the window.
GPT Image 1.5’s generation is consistent on the face of it, until you look at details like the eye color, and the husky poking its head through the window, or against it.
Nano Banana’s generation is much more consistent across each image.
Prompt: “A set of 4 images of a husky puppy with in a different position in each image.”
Nano Banana’s generation is more consistent across each image’s details, like eye color, the windowpane’s markings, and the window being closed in each image.
Prompt structure and predictability
GPT Image 1.5 works well with simple prompts written like normal sentences. You describe an idea and see what the model gives you.
Nano Banana Pro works best with clearer instructions. When you explain what you want step by step, the results follow those instructions more closely.
Text and typography accuracy
Text is a weak point for GPT Image 1.5. Words could come out misspelled, uneven, or hard to read inside the image.
Nano Banana Pro handles text more carefully. Short phrases, titles, and labels are easier to read, and are more consistent between images.
Prompt: A glitzy Las Vegas casino at night with a headliner sign saying ‘Tonight’s Show: Fun XYZ”. Bustling crowds in the background and flamingos standing guard out front.
Consistency across multiple images
GPT Image is fine for single images. When you try to create a series, details often change between results.
Nano Banana Pro keeps characters, objects, and layouts more consistent across images. This helps when you need several visuals that match each other.
Speed when working under deadlines
GPT Image feels fast at the beginning. You get results quickly, but you may need to regenerate a few times to fix issues.
Nano Banana Pro can take a bit more planning, but it often avoids extra fixes later as results are much closer to what you need.
Visual examples where the difference is clear
Thumbnail with readable text
A thumbnail has one job. It needs to be clear at a small size.
GPT Image 1.5 can generate eye-catching visuals, but text often needs fixing before it’s ready to publish. Letters may blur together, spacing can feel off, or words may change between versions.
Nano Banana Pro handles this more reliably. Short titles and labels stay readable, which means you’re less likely to need to rebuild the image before exporting.
Prompt: YouTube-style thumbnail for a short video about working remotely. Scene: A person wearing a beanie and with facial piercings sitting in a busy cafe full of people with a frothy coffee and a laptop on the table. The cafe’s decor is full of artistic graffiti. Composition: Landscape image. The person is centered. Leave clear space at the top for text. Text: Add the words “WORK FROM ANYWHERE” at the top of the image in bold white letters. The text must be easy to read at small sizes. Details: Sharp focus, clean edges, no extra objects, no distorted or broken text.
Brand visual that repeats across formats
Brand visuals usually don’t appear in only one place. The same image may appear in a video, a social post, and a presentation.
With ChatGPT Image, keeping that look consistent can be difficult. Colors, framing, or details may shift each time you regenerate.
Nano Banana Pro makes it easier to keep the same character, product, or layout across formats.
Prompt: A workdesk with a laptop infront of a multicolored wall. The word ‘Focus’ is on the wall. Around the desk and numerous, colorful distractions.
Image used as a base for motion or video
When an image becomes part of a video, small problems get bigger fast.
Images with clean structure are easier to animate, crop, or move through space. If elements drift or text isn’t stable, animation takes longer and feels less controlled.
Nano Banana Pro usually has the edge over these types of visuals.
Prompt: “Create a background image for a short explainer video.
Scene: Abstract but simple background with soft shapes and gentle color gradients.
Composition: Landscape image, 16:9. Center area should stay clear for animation.
Text: No text in the image.
Style: Clean, smooth, professional. No heavy textures or visual noise.
Details: Edges should be clean and stable, suitable for animation or motion.“
Nano Banana Pro: Abstract background with clearer shapes that stay more consistent across images.
How we tested the image models
To compare the models in a fair way, we used the same prompts in ChatGPT Image 1.5 and Nano Banana Pro.
We chose common creator tasks, like thumbnails with text, brand images that need to match, and images used as a base for video or motion.
We ran each prompt several times without changing the wording. This made it easy to see differences in text clarity, layout, and how consistent the images were.
How this fits into a real Artlist workflow
AI images can play different roles in a project. Sometimes they’re finished assets. Other times, they’re used as thumbnails, backgrounds, or starting points for motion or animation. That’s why both GPT Image 1.5 and Nano Banana Pro can sometimes be used inside the same creative workflow.
When images are clear and consistent, they’re easier to reuse and adapt. Using one of the best image generators available makes these images simpler to edit, add sound or footage, and move forward without rebuilding visuals from scratch.
Nano Banana Pro vs GPT Image 1.5
The right choice depends on what you’re trying to do.
If you’re at the beginning of a project, GPT Image 1.5 is a good place to start. It helps you explore ideas, try different looks, and move quickly without worrying too much about details.
When the image needs to be finished and usable, the Nano Banana Pro image model usually makes more sense. Text is clearer, layouts stay more stable, and images are easier to reuse in video, motion, or client work.
Choosing the tool based on the stage of the project keeps things simple. You spend less time fixing problems and more time creating. Both models are available in Artlist’s Toolkit image generator.
FAQs
Did you find this article useful?
