What is the difference between Grok 4 and o3 Mini?

Grok 4 is developed by xAI while o3 Mini is developed by OpenAI. Grok 4 has a 256K token context window vs o3 Mini's 64K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Grok 4 or o3 Mini?

It depends on your use case. Grok 4 and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Grok 4 cost compared to o3 Mini?

Grok 4 costs $3/M input tokens and o3 Mini costs $1.1/M input tokens. o3 Mini is $1.90/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 4 and o3 Mini on Rival?

This page shows a side-by-side comparison of Grok 4 and o3 Mini 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.

Updated Jul 2025

Grok 4vso3 Mini

o3 Mini is cheaper than Grok 4 at $1.1/M vs $3/M input tokens.

Grok 4 and o3 Mini compared across 53 shared prompts
Spec	Grok 4	o3 Mini
Input price	$3/M tokens	$1.1/M tokens
Output price	$15/M tokens	$4.4/M tokens
Context window	256K tokens	64K tokens
Parameters	Not disclosed	Not disclosed
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Jul 2025	Dec 2024
GPQA	87-88%	74.9%