Hy Image 3.5 Preview vs 
Riverflow V2.5 Fast
Hy Image 3.5 Preview is the newer model, released after Riverflow V2.5 Fast.
Hyperrealistic Portrait
One prompt, one photorealistic portrait. Skin, eyes, light.
Loading the build
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Which answer wins?
Price and specs
| Spec | Hy Image 3.5 Preview | Riverflow V2.5 Fast |
|---|---|---|
| Input price | — | Free |
| Output price | — | Free |
| Context window | — | 8K tokens |
| Free API (OpenRouter) | No | No |
| Released | Oct 2026 | Jun 2026 |
| At 10M a month | not listed | $0 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Hy Image 3.5 Preview1 host
Riverflow V2.5 Fast1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Hy Image 3.5 Preview and Riverflow V2.5 Fast?
Hy Image 3.5 Preview is developed by Tencent while Riverflow V2.5 Fast is developed by Sourceful. You can compare their actual outputs across 19 challenges on Rival to see how they differ in practice.
Which is better, Hy Image 3.5 Preview or Riverflow V2.5 Fast?
It depends on your use case. Hy Image 3.5 Preview and Riverflow V2.5 Fast each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 19 challenges so you can judge which fits your needs best.
How can I compare Hy Image 3.5 Preview and Riverflow V2.5 Fast on Rival?
This page shows a side-by-side comparison of Hy Image 3.5 Preview and Riverflow V2.5 Fast 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
- Hy Image 3.5 Preview vs FLUX.3 ImageLanded Oct 2026
- Riverflow V2.5 Fast vs Nano Banana 2.1Landed Oct 2026
- Hy Image 3.5 Preview vs Recraft V4.1 FlashLanded Sep 2026
- Riverflow V2.5 Fast vs GPT Image 2.5 SunburstLanded Sep 2026
- Hy Image 3.5 Preview vs GPT Image 2.5 FlareLanded Sep 2026
- Riverflow V2.5 Fast vs Nano Banana 2 LiteLanded Jun 2026
- Hy Image 3.5 Preview vs Riverflow V2.5 ProLanded Jun 2026
- Riverflow V2.5 Fast vs Recraft V4.1Landed May 2026
Same lab, same size, long tail
- Hy Image 3.5 Preview vs Hunyuan Image 3Same lab
- Hy Image 3.5 Preview vs Nano Banana 2.1Same size
- Riverflow V2.5 Fast vs Riverflow V2.5 ProSame lab
- Riverflow V2.5 Fast vs FLUX.3 ImageSame size
- Hy Image 3.5 Preview vs Playground v2.5 (Aesthetic)Same size
- Hy Image 3.5 Preview vs Qwen ImageSame size
- Hy Image 3.5 Preview vs Qwen Image (Fast)Same size
- Hy Image 3.5 Preview vs Recraft V3Same size
