Hy4 Preview vs 
Quasar Alpha
Hy4 Preview has a larger context window than Quasar Alpha (1.0M tokens vs 1.0M tokens).
Minimalist Landing Page
Whole landing page for a startup that reads your face. It renders or it doesn't.
Loading the build
Loading the build
Which answer wins?
Price and specs
Not enough votes to call it. On the specs, Hy4 Preview has the edge: bigger model tier, newer.
| Spec | Hy4 Preview | Quasar Alpha |
|---|---|---|
| Input price | $0.834/M tokens | — |
| Output price | $2.501/M tokens | — |
| Context window | 1.0M tokens | 1.0M tokens |
| Parameters | 770B total / 49B active | Not disclosed |
| Weights | Open | — |
| Free API (OpenRouter) | No | — |
| Released | Aug 2026 | Apr 2025 |
| At 10M a month | $8.34 | not listed |
Input tokens at list price. No caching, no batch discount.
Where to run it
Quasar Alpha
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Common questions
What is the difference between Hy4 Preview and Quasar Alpha?
Hy4 Preview is developed by Tencent while Quasar Alpha is developed by OpenRouter. Hy4 Preview has a 1.0M token context window vs Quasar Alpha's 1.0M. You can compare their actual outputs across 6 challenges on Rival to see how they differ in practice.
Which is better, Hy4 Preview or Quasar Alpha?
It depends on your use case. Hy4 Preview and Quasar Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 6 challenges so you can judge which fits your needs best.
How can I compare Hy4 Preview and Quasar Alpha on Rival?
This page shows a side-by-side comparison of Hy4 Preview and Quasar Alpha 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
- Hy4 Preview vs Gemini 4 ArgonLanded Oct 2026
- Quasar Alpha vs Muse WonderLanded Oct 2026
- Hy4 Preview vs GPT-4 TurboLanded Oct 2026
- Quasar Alpha vs Step 5 PreviewLanded Oct 2026
- Hy4 Preview vs Claude Haiku 5.5Landed Oct 2026
- Quasar Alpha vs Ling 3.1 FlashLanded Oct 2026
- Hy4 Preview vs Mistral Large 4Landed Oct 2026
- Quasar Alpha vs GPT-6.1 SolLanded Sep 2026
Same lab, same size, long tail
- Hy4 Preview vs Hy3Same lab
- Hy4 Preview vs Step 5 PreviewSame size
- Quasar Alpha vs Ox AlphaSame lab
- Quasar Alpha vs OpenRouter Fusion · Budget (Jun 2026)Same lab
- Hy4 Preview vs GLM 5.3 FlashXNew provider
- Quasar Alpha vs GLM 5.3 PrimeSame size
- Hy4 Preview vs Golden Gate ClaudeNew provider
- Hy4 Preview vs GPT-2New provider
