GPT-5.3 Chat vs 
Grok 3 Mini Beta
Grok 3 Mini Beta is cheaper than GPT-5.3 Chat at $0.4/M vs $1.75/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
GPT-5.3 ChatGPT-5.3 Chat
Inception
Kind of Blue
The Left Hand of Darkness
Tokyo
Tetris (1984)
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
Price and specs
Not enough votes to call it. On the specs, GPT-5.3 Chat has the edge: bigger model tier, newer. Grok 3 Mini Beta costs 18x less per token.
| Spec | GPT-5.3 Chat | Grok 3 Mini Beta |
|---|---|---|
| Input price | $1.75/M tokens | $0.4/M tokens |
| Output price | $14/M tokens | $0.8/M tokens |
| Context window | 128K tokens | 131K tokens |
| Free API (OpenRouter) | No | No |
| Released | Mar 2026 | Apr 2025 |
| At 10M a month | $17.50 | $4.00 |
Input tokens at list price. No caching, no batch discount.
Common questions
What is the difference between GPT-5.3 Chat and Grok 3 Mini Beta?
GPT-5.3 Chat is developed by OpenAI while Grok 3 Mini Beta is developed by xAI. GPT-5.3 Chat has a 128K token context window vs Grok 3 Mini Beta's 131K. You can compare their actual outputs across 13 challenges on Rival to see how they differ in practice.
Which is better, GPT-5.3 Chat or Grok 3 Mini Beta?
It depends on your use case. GPT-5.3 Chat and Grok 3 Mini Beta 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 GPT-5.3 Chat cost compared to Grok 3 Mini Beta?
GPT-5.3 Chat costs $1.75/M input tokens and Grok 3 Mini Beta costs $0.4/M input tokens. Grok 3 Mini Beta is $1.35/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 GPT-5.3 Chat and Grok 3 Mini Beta on Rival?
This page shows a side-by-side comparison of GPT-5.3 Chat and Grok 3 Mini Beta 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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Same lab, same size, long tail
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- Grok 3 Mini Beta vs Grok 4.6Version compare
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