Nano Banana 2 vs Seedream 4
The same prompt at the same ratio, generated by both models. Timing and credits come from this actual run.
How to choose
Both do 4K and both edit. The split is single-image precision versus producing a matching set: Seedream 4’s Series Mode is unique on this site.
| Criterion | Nano Banana 2 | Seedream 4 | Better |
|---|---|---|---|
| Set consistency | Requires reference images | Series Mode handles it natively | Seedream 4 |
| Local editing | More precise | Good | Nano Banana 2 |
| Multilingual text | Average | Better | Seedream 4 |
| 4K output | Supported | Supported | Close |
Specs side by side
| Item | Nano Banana 2 | Seedream 4 |
|---|---|---|
| Provider | ByteDance | |
| Model ID | gemini-3.1-flash-image | bytedance/seedream-4 |
| Max resolution | 4K | 4K |
| Speed | Fast | Fast |
| Reference images | up to 4 | up to 6 |
| Modes | Text to Image, Image to Image, Edit Image, Multi-reference, Product Image | Text to Image, Image to Image, Edit Image, Multi-reference |
| From (credits) | 2 | 2 |
| Negative Prompt | not supported | not supported |
Choose Nano Banana 2 when…
- · You are refining single images
- · Untouched areas must stay untouched
Choose Seedream 4 when…
- · You need a matching set in one run
- · The image carries non-English text
- · You produce content in volume
How this comparison is made
The tables above come from published specs and hands-on use. They contain no scores we have not measured. A shared eight-category benchmark — portrait, product, poster text, anime character, interior, multi-reference, image editing and character consistency — is running for every model, and real generation time, success rate and text accuracy figures will be added here when it completes. Until then, the most reliable test is running your own prompt side by side above.
Frequently Asked Questions
Which for a multilingual poster?+
Seedream 4 or Qwen Image — the latter is more accurate for CJK text.