Claude 3.7 Sonnet vs 
Quasar Alpha
Quasar Alpha has a larger context window than Claude 3.7 Sonnet (1.0M tokens vs 200K tokens).
Minimalist Landing Page
Whole landing page for a startup that reads your face. It renders or it doesn't.
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Which answer wins?
Price and specs
| Spec | Claude 3.7 Sonnet | Quasar Alpha |
|---|---|---|
| Input price | $3/M tokens | — |
| Output price | $15/M tokens | — |
| Context window | 200K tokens | 1.0M tokens |
| Parameters | Not disclosed | Not disclosed |
| Free API (OpenRouter) | No | — |
| Released | Feb 2025 | Apr 2025 |
| At 10M a month | $30.00 | not listed |
Input tokens at list price. No caching, no batch discount.
Common questions
What is the difference between Claude 3.7 Sonnet and Quasar Alpha?
Claude 3.7 Sonnet is developed by Anthropic while Quasar Alpha is developed by OpenRouter. Claude 3.7 Sonnet has a 200K 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, Claude 3.7 Sonnet or Quasar Alpha?
It depends on your use case. Claude 3.7 Sonnet 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 Claude 3.7 Sonnet and Quasar Alpha on Rival?
This page shows a side-by-side comparison of Claude 3.7 Sonnet 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.
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