HiDream L1 (Fast) vs 
Hy Image 3.5 Preview
Hy Image 3.5 Preview is the newer model, released after HiDream L1 (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 | HiDream L1 (Fast) | Hy Image 3.5 Preview |
|---|---|---|
| Weights | Open | — |
| Free API (OpenRouter) | — | No |
| Released | Apr 2025 | Oct 2026 |
Where to run it
HiDream L1 (Fast)
No hosts listed on OpenRouter.
Hy Image 3.5 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between HiDream L1 (Fast) and Hy Image 3.5 Preview?
HiDream L1 (Fast) is developed by PrunaAI while Hy Image 3.5 Preview is developed by Tencent. You can compare their actual outputs across 17 challenges on Rival to see how they differ in practice.
Which is better, HiDream L1 (Fast) or Hy Image 3.5 Preview?
It depends on your use case. HiDream L1 (Fast) and Hy Image 3.5 Preview each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 17 challenges so you can judge which fits your needs best.
How can I compare HiDream L1 (Fast) and Hy Image 3.5 Preview on Rival?
This page shows a side-by-side comparison of HiDream L1 (Fast) and Hy Image 3.5 Preview 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
- HiDream L1 (Fast) vs FLUX.3 ImageLanded Oct 2026
- Hy Image 3.5 Preview vs Nano Banana 2.1Landed Oct 2026
- HiDream L1 (Fast) vs Recraft V4.1 FlashLanded Sep 2026
- Hy Image 3.5 Preview vs GPT Image 2.5 SunburstLanded Sep 2026
- HiDream L1 (Fast) vs GPT Image 2.5 FlareLanded Sep 2026
- Hy Image 3.5 Preview vs Nano Banana 2 LiteLanded Jun 2026
- HiDream L1 (Fast) vs Riverflow V2.5 FastLanded Jun 2026
- Hy Image 3.5 Preview vs Riverflow V2.5 ProLanded Jun 2026
Same lab, same size, long tail
- HiDream L1 (Fast) vs Nano Banana 2.1Same size
- HiDream L1 (Fast) vs GPT Image 2.5 SunburstSame size
- Hy Image 3.5 Preview vs Hunyuan Image 3Same lab
- Hy Image 3.5 Preview vs FLUX.3 ImageSame size
- Hy Image 3.5 Preview vs FLUX 2 DevSame size
- Hy Image 3.5 Preview vs FLUX 2 FlexSame size
- Hy Image 3.5 Preview vs FLUX 2 MaxSame size
- Hy Image 3.5 Preview vs FLUX 2 ProSame size