What is the difference between GPT-4o (Omni) and Grok 3?

GPT-4o (Omni) is developed by OpenAI while Grok 3 is developed by xAI. GPT-4o (Omni) has a 128K token context window vs Grok 3's 128K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-4o (Omni) or Grok 3?

It depends on your use case. GPT-4o (Omni) and Grok 3 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 can I compare GPT-4o (Omni) and Grok 3 on Rival?

This page shows a side-by-side comparison of GPT-4o (Omni) and Grok 3 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 Feb 2025

GPT-4o (Omni)vsGrok 3

Grok 3 is the newer model, released after GPT-4o (Omni).

GPT-4o (Omni) and Grok 3 compared across 53 shared prompts
Spec	GPT-4o (Omni)	Grok 3
Input price	$2.5/M tokens	—
Output price	$10/M tokens	—
Context window	128K tokens	128K tokens
Weights	Closed	—
Free API (OpenRouter)	No	No
Released	May 2024	Feb 2025
MMLU	88.7%	83.1%