Key Takeaways

• Qwen 2509 Image Generator now supports multi-image editing with up to 3 images at once
• Enhanced consistency for faces, products, and text editing compared to previous versions
• Native ControlNet support adds precision for professional workflows
• Each AI model has unique strengths – the key is knowing when to use which one
• Multi-image capability changes the game for creative professionals and agencies

A new week, a new image generator: Qwen 2509 Image Generator

The AI image generator race moves fast! It was just about two weeks ago that Seedream 4.0 released to the public and challenged Nano Banana for the title of best image generator. Well now there’s a new player in town – the Qwen 2509 Image Generator – and it’s looking like a strong contender against both Seedream and Nano Banana.

In this article, I’ll compare all three image models using the same prompts and images to see which one performs best in each category. This challenge was designed to put three powerful models—Qwen 2509, Nano Banana, and Seedream 4.0—through a series of real creative tests. From pose shifts and style changes to object removals, ad creation, and emotional transformations, the goal was simple: see who handles complex, practical edits the best.

We’re only scratching the surface of what’s possible, and the next generation of models will likely blur the line even further between what’s AI-made and what’s human-made.

Meet the Contenders: Qwen 2509, Nano Banana, and Seedream 4.0

Qwen Image Edit 2509 brings some serious upgrades. Unlike its August predecessor, which could only handle single images, this September version now supports multi-image editing with up to three inputs. That’s huge for agencies like mine who need to combine different elements into one cohesive design.

Nano Banana has been my go-to for consistent, high-quality results. It excels at photorealistic edits and handles complex prompts without breaking a sweat. The model is particularly strong with human faces and natural lighting, making it perfect for portrait work and professional headshots.

The speed and reliability of Nano Banana make it ideal for client work where you need predictable results. When I’m working on insane use cases for creative projects, Nano Banana rarely disappoints.

Seedream 4.0 burst onto the scene with impressive artistic capabilities. Our previous comparison between Nano Banana vs Seedream 4.0 showed that ByteDance’s model excels at creative interpretation and stylistic transformations. It’s particularly strong with anime-style artwork, fantasy elements, and dramatic lighting effects.

The model’s ability to understand complex artistic styles makes it valuable for creative campaigns that need that extra artistic flair. However, it can sometimes be less predictable than Nano Banana when it comes to precise edits.

Our Comparison Test Overview

We ran each model through a variety of real-world creative tasks designed to mirror the types of challenges that agencies, brands, and creators face every day. Instead of focusing only on simple benchmarks, we pushed the models into practical scenarios that tested both their technical precision and creative flexibility.

• Pose changes
• Camera angle shifts
• Object replacement & removal
• Style transfers (Pixar look, ads, branding)
• Emotional expression generation
• Text replacements

Every challenge highlighted different strengths. Some models excelled at precision, others at creativity, and some at speed. Together, they reveal just how far AI editing has come—and how close it is to being an indispensable creative tool.

Qwen 2509 vs Nano Banana vs Seedream 4.0

1. Pose Change Accuracy

This test explores how well different image models handle changing a subject’s pose while keeping the rest of the photo consistent. The challenge is about precision—altering body direction or gestures without distorting key details like background, lighting, or realism.

Prompt

Make this woman look at the camera while holding a sunflower towards the camera

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: Nailed my prompt the best. She’s looking straight at the camera, and the sunflower is being held directly toward me, just like I asked. It feels like the exact moment I had in mind. Also the overall environment was kept exactly like the original image.

Nano Banana: She is making eye contact, but the flower isn’t really being held or pointed toward me—it’s more to the side. That makes it feel only halfway there. Also the background changed and the rows of sunflowers look more symmetrical.

Seedream 4.0: Also has her looking at the camera, but the sunflower isn’t being held out in front—it’s closer to her chest. That misses the “towards the camera” part of the prompt.

Winner: Qwen 2509 ⟁

2. Camera Angle Shift

This challenge tests how well different image models can change the camera perspective without breaking the overall look of the scene. The goal is to see if the models can create a convincing high-angle shot while keeping the subject natural and the background consistent.

Prompt

Change the camera view to a high-angle shot so the person is looking directly at the camera

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: The person is looking at the camera, but the angle is not high—it’s more straight-on, so it doesn’t satisfy the high-angle requirement.

Nano Banana: The shot still looks like a low-angle perspective, similar to the original. She isn’t looking directly at the camera either, so it misses both parts of the prompt.

Seedream 4.0: This one follows the prompt the best. The camera view is clearly shifted to a high-angle shot, looking down on the person, and she is making direct eye contact with the camera.

Winner: Seedream ☁

3. Branded Product Set Design

This challenge tested how well the image models could take a single logo and expand it into a full branded product set. The key was not just variety, but also keeping the colors accurate, the style modern, and the layouts realistic so the final visuals looked like a true brand presentation.

Prompt

Refer to this logo, create a set of visual designs for a clothing brand named JZ CREATES. The products include packaging bags, hats, cards, wristbands, cartons, and lanyards. The main visual color is red, with a simple and modern style.

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: While it includes a wide range of items, the red feels slightly off from the original logo color. The layout also looks a bit more like a template than a natural brand set.

Nano Banana: This one falls short since it only provides a single shopping bag. It doesn’t meet the prompt’s request for multiple branded items.

Seedream 4.0: The red tone stays true to the original brand color, and the items are laid out in a realistic, professional way that feels authentic to the brand. It strikes the right balance of variety and presentation.

Winner: Seedream ☁

4. Object Replacement

This challenge tested how well the models could replace one object with another while keeping everything else in the image intact. The goal was to swap the trumpet for a saxophone without breaking hand placement, body posture, or realism—showing which model could make the change look the most natural.

Prompt

Change the trumpet to a saxophone

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: The saxophone is there, but it doesn’t look fully natural. The positioning feels a little awkward, and the details aren’t as convincing.

Nano Banana: The saxophone looks the most accurate, with proper finger placement, natural hand positioning, even though the sax is a bit smaller. Everything feels well-integrated and realistic.

Seedream 4.0: The saxophone looks very detailed, but it comes at the cost of realism—the man’s arm is missing, which completely takes this image out of the race.

Winner: Nano Banana 🍌

5. Object Removal

This challenge tested how well the models could completely erase an object from a scene while keeping the environment natural and consistent. It wasn’t just about deleting the bike—it also came down to handling tricky details like reflections in the glass and making sure the background felt seamless and believable.

Prompt

Remove the bicycle

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: The bike is mostly gone, but the pole area looks awkward and not as polished. The reflection in the window is also left untouched, which makes the edit less convincing.

Nano Banana: The bicycle is completely removed, and the background looks clean and natural with no major artifacts. The only drawback is that the reflection of the bike in the window is still visible, so it isn’t a perfect removal.

Seedream 4.0: The bike is removed, and it did a great job cleaning up the reflection in the window, which makes the scene more realistic. However, it left the rope on the pole, making the edit feel incomplete overall.

Winner: Nano Banana 🍌

6. Style Transformation

This challenge tested how well the models could take a real photo and completely transform it into a Pixar-style animation. The key wasn’t just adding cartoony faces, but reimagining the whole scene—characters, lighting, and atmosphere—so it felt like a frame straight out of an animated film.

Prompt

Change the style to Pixar animation

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: It partially converts the faces into a cartoony look, but the bodies and background remain too close to the original photo. It feels more like a face filter than a full Pixar transformation. Also kinda scary, I’m sorry to have posted this.

Nano Banana: This one barely changes the style at all—the image looks almost identical to the original photo. It doesn’t deliver the Pixar effect that the prompt asked for.

Seedream 4.0: This one clearly wins. It fully transforms the photo into a Pixar-style animation, with both characters looking like they belong in an animated movie. The colors, shading, and details feel polished and true to the Pixar aesthetic.

Winner: Seedream ☁

7. Text Replacement

This challenge tested how well the models could replace text in an image while keeping the style, texture, and realism of the original. The goal was to swap out the word naturally so it looked painted onto the sign, not digitally pasted on top.

Prompt

Change the text to “CREATE”

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: The text is changed correctly, but it doesn’t blend into the wood as smoothly. It looks a little too digitally overlaid compared to Nano Banana’s version.

Nano Banana: The word “CREATE” looks clean, well-integrated, and matches the original style of the sign. The wood texture and paint look natural, as if the sign was always written this way.

Seedream 4.0: Also very strong—“CREATE” is clear and bold, but the paint looks slightly brighter than the original, which makes it stand out a bit unnaturally. Still, a solid attempt.

Winner: Nano Banana 🍌

8. Scene Composition

This challenge tested how well the models could take two separate people and convincingly place them together in a new scene—in this case, at a wedding altar. The key was not just merging them, but transforming their outfits, environment, and body language so the final result looked like a real moment rather than two images patched together.

Prompt

Place these two people at an altar, getting married

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: While it does place the two at an altar, it didn’t change their clothing into wedding attire. They still look like they’re in their casual outfits, which doesn’t fit the “getting married” part of the prompt.

Nano Banana: It places the two people at the altar in a realistic wedding setting, with proper attire, lighting, and environment. The scene feels complete and natural, as if it were a real photo of their ceremony.

Seedream 4.0: This version is also strong—the altar and ceremony look convincing—but the pose feels a bit staged, and the composition isn’t as seamless as Nano Banana’s.

Winner: Nano Banana 🍌

9. Ad Creation & Branding

This challenge tested how well the models could transform a plain product photo into a fully designed advertisement. The goal was to combine dramatic backgrounds, special effects, and strong typography into a polished ad that not only followed the text instructions but also felt like something you’d actually see in a professional sports campaign.

Prompt

Make a cool ad for this shoe. I want the background to be storm clouds, lightning flashes, and the shoe is electrified with energy. I want the header to say “Electrify Your Run” and the sub-header to say”Forged in lightning, built for unstoppable energy.”

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: A strong attempt, but the electricity effect around the shoe looks a bit flat and pasted on. The overall design doesn’t have the same impact as Nano Banana’s.

Nano Banana: Looks amazing! The design nails the energy effect—the shoe looks electrified, the angle is different, the storm clouds add drama, BUT there is a typography error here, can you see it? This automatically disqualifies it.

Seedream 4.0: The background storm and text look good, but the shoe itself doesn’t feel as electrified or integrated into the scene. The energy effect is weaker compared to Nano Banana.

Winner: Seedream ☁

10. Emotion Generation

This challenge tested how well the models could take one neutral portrait and generate a full set of distinct emotions. The goal was to produce clear and believable expressions without blending them together or making them look unnatural.

Prompt

Give me a set of 4 images with different emotions: happy, sad, laughing, crying

Original

Qwen 2509

Nano Banana

Seedream 4.0

Qwen 2509: The set attempts different emotions, but they don’t come across as strongly. The crying and sad faces especially don’t feel very convincing compared to Seedream’s.

Seedream 4.0: It conveys all four emotions—happy, sad, laughing, and crying—more clearly than the others. Even though the last image is zoomed in a little too much, the expressions themselves are distinct and easy to read.

Nano Banana: At first glance, it looks solid, but the happy and sad images are almost identical. The laughing expression also looks mixed with crying, which makes it less clear overall.

Winner: Seedream ☁️

Final Verdict: Who Won?

Out of the 10 different tests, Seedream came out on top with 5 wins, followed by Nano Banana 4.0 with 4 wins, and Qwen 2509 with 1 win.

Across the challenges, Seedream 4.0showed its strength in branded product placements, emotional clarity, and polished, professional-looking outputs. When creative flair and realism matter most, it’s the go-to choice for generating visuals with style and impact..

Qwen 2509 is best for:

• Solid at straightforward pose changes (like high-angle or holding items).
• Good at quick object swaps, even if not always perfect.
• Sometimes less polished, but useful for fast, functional edits rather than full artistic transformations.

Nano Banana is better for:

• Very good at object removal (like cleaning up the bike scene).
• Strong with clear edits like text replacement.
• Often produces clean, simple results that look natural.
• Reliable for ad-style compositions with bold visuals.

Seedream 4.0 is better for:

• Best at style transformations (Pixar animation, ad creation).
• Handles expressions and emotions with precision.
• Strong in object replacements (like the saxophone, despite one slip with the missing arm).
• Great at creating professional, branded visuals.

My Final Thoughts

After running these challenges, it’s clear that each model has its own strengths. Some excel at realism, others at speed, and some at creativity. What matters most is choosing the right tool for the right task. For me, the biggest takeaway is that AI image generation isn’t about finding one “perfect” model—it’s about knowing how to use each one strategically to get the best results.

For my agency’s workflow, I use all three models depending on the project. Check out these amazing Seedream 4.0 examples to see what’s possible.

How JZ Creates Can Help Your Next Project

At JZ Creates, we bring 20+ years of creative direction together with the latest AI tools. That means we don’t just rely on one model – we know how to mix, match, and fine-tune them to produce scroll-stopping visuals. From photorealistic edits and product mockups to animated transformations and ad-ready designs, we handle the technical side so brands can focus on strategy and storytelling.

Our digital marketing services integrate these cutting-edge AI tools with proven marketing strategies. Whether you need product photography for e-commerce, social media content that converts, or brand visuals that stand out, we combine the best of human creativity with AI efficiency.

Ready to Transform Your Creative Process?

If you’ve been curious about how AI can speed up your workflow, reduce production costs, or expand what’s possible for your brand, now’s the time to explore it. Whether you’re an agency, a business, or a creator, JZ Creates can help you harness AI to create more, faster, and with higher impact. Let’s collaborate and bring your ideas to life in ways that feel fresh, modern, and impossible to ignore.

Ready to see what’s possible when cutting-edge AI meets experienced creative direction? Contact us today and let’s discuss how we can transform your next project using the best combination of Qwen 2509, Nano Banana, Seedream 4.0, and whatever new tools emerge next week.