Nano Banana 2 vs 
Seedream 4
Nano Banana 2 is the newer model, released after Seedream 4.
Hyperrealistic Portrait
One prompt, one photorealistic portrait. Skin, eyes, light.
Loading the build
Loading the build
Which answer wins?
Price and specs
Not enough votes to call it. On the specs, Nano Banana 2 has the edge: newer, major provider backing.
| Spec | Nano Banana 2 | Seedream 4 |
|---|---|---|
| Weights | Closed | — |
| Free API (OpenRouter) | No | — |
| Released | Feb 2026 | Nov 2025 |
Where to run it
Seedream 4
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 11 Oct 2026.
Common questions
What is the difference between Nano Banana 2 and Seedream 4?
Nano Banana 2 is developed by Google AI while Seedream 4 is developed by ByteDance. You can compare their actual outputs across 16 challenges on Rival to see how they differ in practice.
Which is better, Nano Banana 2 or Seedream 4?
It depends on your use case. Nano Banana 2 and Seedream 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 16 challenges so you can judge which fits your needs best.
How can I compare Nano Banana 2 and Seedream 4 on Rival?
This page shows a side-by-side comparison of Nano Banana 2 and Seedream 4 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.
More comparisons
Against the newest arrivals
- Nano Banana 2 vs Hy Image 3.5 PreviewLanded Oct 2026
- Seedream 4 vs FLUX.3 ImageLanded Oct 2026
- Nano Banana 2 vs Nano Banana 2.1Landed Oct 2026
- Seedream 4 vs Recraft V4.1 FlashLanded Sep 2026
- Nano Banana 2 vs GPT Image 2.5 SunburstLanded Sep 2026
- Seedream 4 vs GPT Image 2.5 FlareLanded Sep 2026
- Nano Banana 2 vs Nano Banana 2 LiteLanded Jun 2026
- Seedream 4 vs Riverflow V2.5 FastLanded Jun 2026
Same lab, same size, long tail
- Nano Banana 2 vs Imagen 4Same lab
- Nano Banana 2 vs Imagen 3 FastSame lab
- Seedream 4 vs Hy Image 3.5 PreviewSame size
- Seedream 4 vs Nano Banana 2.1Same size
- Nano Banana 2 vs GPT Image 2.5 FlareNew provider
- Nano Banana 2 vs Grok Imagine ImageSame size
- Nano Banana 2 vs HiDream L1 (Fast)Same size
- Nano Banana 2 vs Hunyuan Image 3Same size
