Grok 3 Mini Beta vs 
OpenAI o3
Grok 3 Mini Beta is cheaper than OpenAI o3 at $0.4/M vs $10/M input 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?
Favorites
Movie
Album
Book
City
Game
Grok 3 Mini BetaGrok 3 Mini Beta
The Matrix
The Dark Side of the Moon
I, Robot
San Francisco
The Legend of Zelda: Breath of the Wild
OpenAI o3OpenAI o3
No pick
No pick
No pick
Blade Runner
No pick
No pick
Kyoto
No pick
Price and specs
Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier. Grok 3 Mini Beta costs 50x less per token.
| Spec | Grok 3 Mini Beta | OpenAI o3 |
|---|---|---|
| Input price | $0.4/M tokens | $10/M tokens |
| Output price | $0.8/M tokens | $40/M tokens |
| Context window | 131K tokens | — |
| Parameters | Not disclosed | Not disclosed |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Apr 2025 | Apr 2025 |
| At 10M a month | $4.00 | $100 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Grok 3 Mini Beta
No hosts listed on OpenRouter.
OpenAI o31 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Common questions
What is the difference between Grok 3 Mini Beta and OpenAI o3?
Grok 3 Mini Beta is developed by xAI while OpenAI o3 is developed by OpenAI. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.
Which is better, Grok 3 Mini Beta or OpenAI o3?
It depends on your use case. Grok 3 Mini Beta and OpenAI o3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 13 challenges so you can judge which fits your needs best.
How much does Grok 3 Mini Beta cost compared to OpenAI o3?
Grok 3 Mini Beta costs $0.4/M input tokens and OpenAI o3 costs $10/M input tokens. Grok 3 Mini Beta is $9.60/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.
How can I compare Grok 3 Mini Beta and OpenAI o3 on Rival?
This page shows a side-by-side comparison of Grok 3 Mini Beta and OpenAI o3 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
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