Key Highlights –
- ByteDance’s Seedream 4.0 outperforms Google’s Nano Banana in internal benchmarks.
- Seedream 4.0 supports 4K resolution and batch processing for enhanced productivity.
- Users can access Seedream 4.0 via ByteDance’s Volcano Engine and partner platforms.
Chinese tech giant ByteDance has stepped into the ring to directly challenge Google DeepMind in the AI image generation space. The company, known for its short-video platform TikTok, has launched Seedream 4.0, an ambitious new model that it claims surpasses Google’s viral Nano Banana in critical performance areas.
🚨China just put out an incredible new image editing model beats Google’s Nanobanana to be #1 in image editing!
— Deedy (@deedydas) September 10, 2025
Bytedance Seedream 4 is better at:
—2K resolution < 2s. 4K support. 🍌 is low res
—Much more lax policy on generations
—Generate multiple images at once in a set!
—Far… pic.twitter.com/liArFr5z9k
What Makes Seedream 4.0 Stand Out
According to ByteDance, Seedream 4.0 has demonstrated upto 10 times improved performance over its predecessor, Seedream 3.0, especially when it comes to generating high-definition images at up to 4K resolution. The model excels in areas such as prompt adherence, alignment, and aesthetics, as evidenced by its top rankings in internal benchmarks like MagicBench and MagicArena. These benchmarks assess various dimensions, including text-to-image tasks and single-image editing, where Seedream 4.0 has shown a good balance between accuracy and visual appeal.
This launch is a direct response to the claims already made by Google’s Nano Banana, which has been lauded for its image-editing tasks. And while Nano Banana had become the go-to tool for users looking to edit photos using AI the arrival of Seedream 4.0, has made the top position far more competitive.
Seedream 4.0 vs Gemini 2.5 Flash image gen 🍌
— Angel Bogado 🌻 (@Angaisb_) September 10, 2025
Seedream 4.0 seems to have a better understanding of intent, and it also made a better edit in this case
"Remove all the ingredients from the burger and keep only the top and bottom buns. Leave a gap between them, keeping the same… pic.twitter.com/mm9iAPgcLlSeedream 4.0 comparison with other models across core dimensions
A key feature of Seedream 4.0 is its remarkable speed. ByteDance has stated that the model’s new architecture allows for inference speeds up to 10 times faster than its predecessor, delivering high-resolution images in seconds. It also introduces the ability to handle multi-reference inputs, allowing users to upload up to six images to ensure a consistent visual identity across generated outputs. This feature is particularly valuable for creators and businesses that require character and style consistency across a series of images.
Testing the new image model that just dropped: Seedream Edit 4
— Justine Moore (@venturetwins) September 9, 2025
It seems pretty good at more complex edits from a single prompt.
"make the anime woman jumping into the puddle"
(this requires extracting and re-coloring the subject + adding reflections) pic.twitter.com/Ej7G1hyl91
Even though ByteDance’s internal tests favor its new model, it was backed by another independent AI benchmark firm Artificial Analysis.
Seedream 4.0 is the new leading image model across both the Artificial Analysis Text to Image and Image Editing Arena, surpassing Google's Gemini 2.5 Flash (Nano-Banana), across both!
— Artificial Analysis (@ArtificialAnlys) September 11, 2025
Seedream 4.0 is the latest release from Bytedance Seed, and is a substantial improvement on… pic.twitter.com/I46tY58zJh
Reddit discussions however, are divided with users noting that while Seedream 4.0 has “aesthetic wins” and produces visually pleasing, high-quality images, Nano Banana is “on another level for consistency,” especially in editing scenarios where it can maintain a person’s exact likeness.
Comment
byu/arsearsebaby from discussion
insingularity
Apart from the technical performance, pricing is another important factor in the competiton. The introduction of Seedream 4.0 at a cost of approximately $0.03 per image on platforms like Fal.ai, slightly undercutting Nano Banana’s price of $0.039, indicates a willingness to compete on value. This pricing strategy could attract high-volume users and developers seeking a cost-effective alternative. However, which model of the two will be preferred more with the users, only time will tell.