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.

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.

GPT-4o (Omni) vs Grok 3: Which Is Better?

Updated Feb 2025

Our Verdict

GPT-4o (Omni)

Grok 3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Grok 3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

64%

GPT-4o (Omni) uses 3.3x more transitions

GPT-4o (Omni)

Grok 3

54%Vocabulary49%

18wSentence Length18w

0.72Hedging0.94

7.3Bold2.5

5.6Lists3.0

0.03Emoji0.04

1.40Headings0.65

0.26Transitions0.08

Based on 24 + 17 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Grok 3 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-4o (Omni) vs Llama 4 MaverickNew provider

Grok 3 vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider

Updated Feb 2025

Our Verdict

GPT-4o (Omni)

Grok 3

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Grok 3

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

64%

GPT-4o (Omni) uses 3.3x more transitions

GPT-4o (Omni)

Grok 3

54%Vocabulary49%

18wSentence Length18w

0.72Hedging0.94

7.3Bold2.5

5.6Lists3.0

0.03Emoji0.04

1.40Headings0.65

0.26Transitions0.08

Based on 24 + 17 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Grok 3 have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

GPT-4o (Omni) vs Llama 4 MaverickNew provider

Grok 3 vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider