Which Is Better — Nano Banana or Seedream 4.0? Find Out Yourself.

See for yourself how two of the most powerful AI image generators compare — Google’s Nano Banana vs ByteDance’s Seedream 4.0. Upload an image, enter your prompt, and generate side-by-side results instantly.

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Nano Banana vs Seedream 4.0 comparison image — side-by-side anime-style girl on beach, showcasing vibrant sporty look from both AI models with ‘VS’ in the center.

Which Model Actually Wins? Test It Yourself.

Ever wondered if Seedream 4.0 really outperforms Google’s Nano Banana? Blog posts and Reddit threads have opinions, but on LMArena, you can’t even pick the model — frustrating, right? At Carat, we let you decide. 🔍 Upload your own image, edit the prompt, and instantly run both models side by side. No guesswork. No locked-in defaults. Just pure model-to-model face-off with real results.

Side-by-Side Comparison

Run the same prompt on Nano Banana and Seedream 4.0 — see the difference in real time.

Prompt Once, Double the Output

Enter one prompt, get two results. No need to rewrite or reframe — we handle the rest.

Two AI-generated images based on the prompt: “A cute golden doodle riding a skateboard in SF at night.” Left: Nano Banana’s cinematic, calm take. Right: Seedream 4.0’s dynamic, neon-lit version.

Model Swap Anytime

Just edit the prompt and swap out Nano or Seedream — no need to start over.

How to Compare Nano Banana and Seedream 4.0 on Carat

Generating side-by-side images with both models takes just a few seconds:

Upload your base image

You can start with a selfie, photo, or sketch.

Press 'Generate' or edit the default prompt

Start with the default, or personalize the prompt to get what you want.

Compare, download, or iterate

Keep refining your prompt and explore which model works best for your creative goals

Pro Tips for Better Comparisons

Want better vibes, faster? Keep these in mind:

If you’re comparing, say so — and keep model names in.

Prompting two styles or characters? Say “side-by-side comparison of A vs B." Make sure to keep the model name in the prompt. The system needs that cue to pick the right one.\ Want to compare across models? Just swap the model name — the rest of your prompt can stay the same.

Be specific, not poetic.

“Magical” is nice, but “glowing lanterns, foggy forest” gets you closer to what you want. Paint with words, literally.

Don’t mix too many styles.

“Anime + Pixar + Renaissance oil painting” sounds fun but often breaks the model. Stick to one or two vibes per run.

Frequently Asked Questions

All you need to know about comparing Nano Banana and Seedream 4 on Carat AI

When should I use Nano Banana vs. Seedream 4.0?

Use Nano Banana when you need hyper-realism, fine details, and photographic quality, making it perfect for portraits and realistic scenes. Use Seedream 4.0 when you want creative, artistic, and imaginative styles, which is ideal for fantasy art, abstract concepts, and unique illustrations.

Do I need to pay to try both of these models on Carat AI?

Will the images I generate have watermarks?

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