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  5. o1vsQuasar Alpha
Updated Apr 2025

o1vsQuasar Alpha

Quasar Alpha has a larger context window than o1 (1.0M tokens vs 128K tokens).

o1 and Quasar Alpha compared across 6 shared prompts
Speco1Quasar Alpha
Input price$15/M tokens—
Output price$60/M tokens—
Context window128K tokens1.0M tokens
ParametersNot disclosedNot disclosed
WeightsClosed—
Free API (OpenRouter)No—
ReleasedDec 2024Apr 2025
Our Verdict
Quasar Alpha
Quasar Alpha
o1
o1Runner-up

Not enough votes to call it. On the specs, Quasar Alpha has the edge: bigger model tier, newer, bigger context window.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

o1
Input
$15.00
Output
$60.00
Quasar Alpha
Input
—
Output
—
Where to run it

1 host

o11 host
HostInOutContextUptime
OpenAI$15.00 in·$60.00 out·200k·100% up
Quasar Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

o1 is developed by OpenAI while Quasar Alpha is developed by OpenRouter. o1 has a 128K 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.

It depends on your use case. o1 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.

This page shows a side-by-side comparison of o1 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.

Keep exploring

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Model pages

o1 logo
o159 outputs, specs and price
Quasar Alpha logo
Quasar Alpha6 outputs, specs and price
Rival
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Explore all of Rival

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