ByteDance has lured plenty of YouTube Shorts viewers away to TikTok, but their new Seedream 5.0 AI model seems calculated to win over fans of Google Gemini's Nano Banana Pro AI image-generator.
After hearing more than a few bold claims of new and enhanced image-creation, I decided to see how well it performed when directly compared to Nano Banana Pro.
Sea glass
ByteDance pointed to Seedream 5.0's way with light frequently, specifically how it behaved as though constrained by physics like real light is. To -aware lighting and global illumination refer to how convincingly a model simulates the behavior of light in a scene.
I wanted to make it extra difficult and requested both models make, "An underwater photograph of a school of jellyfish made entirely of intricate, hand-blown Venetian glass. They are bioluminescent from within, casting colored light onto the surrounding coral reef and fish. The water should distort the light passing through the glass bodies."
This includes how light refracts through transparent materials, scatters underwater, casts colored illumination onto nearby objects, and obeys environmental constraints. In a physically grounded system, light should interact consistently with glass, water, and coral, rather than appearing as a flat glow layered on top.
Seedream 5.0’s jellyfish scene is lush and radiant. The glass bodies glow with swirling internal color, and the surrounding water feels immersive and cinematic. Light spills outward in soft gradients, bathing coral and fish in tinted hues. The result feels like a fantasy illustration rendered with high polish.
Nano Banana Pro approaches the scene with more restraint. The jellyfish read as structured glass objects with defined curvature and thickness. Light refracts through them with sharper caustics and more believable distortion.
Victorian gamers
Next I wanted to see how the models did with what ByteDance calls "semantic parsing". That's really just a short way of describing how a model can correctly interpret layered, complex prompts that combine time periods, materials, technologies, and stylistic instructions. It is about understanding not just individual keywords, but how they fit together logically. In this test, the model must reconcile
I asked for: A sepia-toned photograph from the 1890s. Victorian gentlemen in top hats and tweed suits are intensely focused, holding brass and mahogany controllers connected to a massive, steam-punk style arcade cabinet made of copper pipes and gauges, displaying a pixelated 8-bit platformer game.
Seedream 5.0 delivers a dramatic tableau. The gentlemen in top hats lean in with intensity, surrounded by ornate brass pipes and warm sepia tones. The steampunk cabinet is intricate and theatrical. The 8-bit game is present and looks like the original Super Mario Bros. game. , though the emphasis is on atmosphere rather than mechanical plausibility.
Nano Banana Pro produces a more chaotic scene. There's little pretense behind the gaming cabinet, no sense that the pipes go anywhere and do anything. Despite that, it comes off as more grounded as a scene for some reason.
Brass butterfly
To test Seedrem 5.0's advanced material rendering, I needed a prompt that would theoretically depict surface properties such as metal, glass, velvet, water droplets, and microscopic imperfections. It is not enough for an object to look metallic or soft in a general sense. The model must show believable reflectivity, translucency, texture, and interaction between surfaces.
This time, the prompt was: A macro photography shot of a mechanical butterfly perched on a dew-covered red rose. The butterfly’s wings are made of intricate stained glass and brass gears, with visible microscopic dust on the metal. The rose petals show velvety texture and crystalline water droplets reflecting the garden.
Both Nano Banana Pro and Seedream 5.0 made a mechanical butterfly in a vibrant and romantic close-up. It's hard to pick between the two when it comes to showing how different materials interact in real life. They are well matched in that regard
Real-time visuals
Real-time search integration is something new to Seedream 5.0. It's a way for the model to incorporate up-to-date, accurate information into images. In visual terms, this means correctly rendering logos, text, current events, and recognizable landmarks. With the Super Bowl only just occuring, I requested:
A wide-angle cinematic shot of the Seattle Seahawks’ 2026 Super Bowl LX victory parade. In the center of the frame, a massive, whimsical 50-foot-tall holographic Seahawk is flying through the streets of downtown Seattle, breathing blue and green neon smoke. The crowds below are wearing 2026 championship gear with the “Seahawks Super Bowl LX Champions” logo clearly legible.
Both models did a pretty good job overall. I'd argue Nano Banana Pro made a much more impressive holographic Seahawk and made a point of getting the Space Needle in to show it's Seattle better. But, in terms of the actual logo, Seedream 5.0 got it exactly right. Almost too right in fact, as some of those same accurate logos seem soft or distorted slightly.
Alien rave
For the last test, I wanted to see how well the Seedream 5.0's vaunted visual-language alignment measured up. That's a way of describing how accurately a model translates abstract, complex language into visual elements in a coherent way. My actua prompt wasn't for a very common event, admittedly. I asked for:
An extreme close-up on the golden visor of an astronaut’s helmet on the Moon. Reflected clearly in the curved visor is a massive, colorful alien psychedelic dance party happening in front of them, complete with lasers and strange aliens, with the Earth hanging in the background of the reflection.
Seedream 5.0 embraces exuberance. The visor glows warmly, and the alien dance party bursts with color and motion. Lasers fan outward in dramatic arcs. Creatures are expressive and stylized. Earth appears integrated into the reflection with painterly balance.
Nano Banana Pro renders the visor with sharper highlights and visible surface wear. Lunar dust and fine scratches are present. The reflection obeys perspective more tightly. Alien figures and lasers conform more convincingly to the curvature of the visor. The Earth even looks more like it would from the Moon, smaller than the one Seedream 5.9 made.
The verdict
I'd argue there's not much distance in terms of the quality of the two models. In some ways, Seedream 5.0 seems more cinematic, while Nano Banana Pro consistently emphasizes coherence, legibility, and physical plausibility.
But they simply prioritize different virtues. Seedream 5.0’s launch positioned it as a challenger. Based on these side-by-side results, it does not dethrone Nano Banana Pro, but it does carve out a space for an alternative.
Follow TechRadar on Google News and add us as a preferred source to get our expert news, reviews, and opinion in your feeds. Make sure to click the Follow button!
And of course you can also follow TechRadar on TikTok for news, reviews, unboxings in video form, and get regular updates from us on WhatsApp too.
You must confirm your public display name before commenting
Please logout and then login again, you will then be prompted to enter your display name.