Grok 3 Mini Beta vs 
Mercury 2
Mercury 2 is cheaper than Grok 3 Mini Beta at $0.25/M vs $0.4/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
Mercury 2Mercury 2
The Shawshank Redemption
Thriller
Pride and Prejudice
Tokyo
Minecraft
Price and specs
Not enough votes to call it. On the specs, Mercury 2 has the edge: bigger model tier, newer.
| Spec | Grok 3 Mini Beta | Mercury 2 |
|---|---|---|
| Input price | $0.4/M tokens | $0.25/M tokens |
| Output price | $0.8/M tokens | $0.75/M tokens |
| Context window | 131K tokens | 128K tokens |
| Free API (OpenRouter) | No | No |
| Released | Apr 2025 | Mar 2026 |
| At 10M a month | $4.00 | $2.50 |
Input tokens at list price. No caching, no batch discount.
Where to run it
Grok 3 Mini Beta
No hosts listed on OpenRouter.
Mercury 21 host
Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.
Common questions
What is the difference between Grok 3 Mini Beta and Mercury 2?
Grok 3 Mini Beta is developed by xAI while Mercury 2 is developed by Inception. Grok 3 Mini Beta has a 131K token context window vs Mercury 2's 128K. 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 Mercury 2?
It depends on your use case. Grok 3 Mini Beta and Mercury 2 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 Mercury 2?
Grok 3 Mini Beta costs $0.4/M input tokens and Mercury 2 costs $0.25/M input tokens. Mercury 2 is $0.15/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 Mercury 2 on Rival?
This page shows a side-by-side comparison of Grok 3 Mini Beta and Mercury 2 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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