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 28 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 28 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, and Pro users can create custom challenges to test both models with their own prompts.

Rival

Updated Feb 18, 2025

GPT-4o (Omni)vsGrok 3

28 fights queued

Why GPT-4o (Omni)?

Leads 3 of 4 benchmarks

Stronger on MATH75.9% vs 69.7%

Why Grok 3?

Stronger on HumanEval94.5% vs 90.2%

9 months newerFeb 2025

GPT-4o (Omni)Grok 3

Input price

$2.50/M

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Output price

$10.00/M

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Context

128K

Released

May 2024

Feb 2025

Benchmarks4 common

MMLU

88.7%+6.3%

83.1%

GPQA

53.1%+2.3%

51.9%

MATH

75.9%+8.2%

69.7%

HumanEval

90.2%

94.5%+4.6%

Favorites

GPT-4o (Omni)Grok 3

Movie

Inception

20108.4

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Album

Dark Side Of The Moon

suisside

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Book

To Kill a Mockingbird

Harper Lee

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City

Kyoto

Japan

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Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5

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12 / 28

Estimate Complexityreasoning

Tests an AI's ability to make educated estimates based on technical knowledge

GPT-4o (Omni)

Openai · May 2024text

Nothing here. The model returned empty. We stared at it for a while.

GPT-4o (Omni) vs Grok 3

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