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

GPT-4o (Omni) is developed by OpenAI while Grok 3 Beta is developed by xAI. GPT-4o (Omni) has a 128K token context window vs Grok 3 Beta's 131K. These results are based on blind head-to-head voting across 54 challenges.

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

Based on 2 community votes on Rival, GPT-4o (Omni) and Grok 3 Beta are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 54 challenges to decide.

How much does GPT-4o (Omni) cost compared to Grok 3 Beta?

GPT-4o (Omni) costs $2.5/M input tokens and Grok 3 Beta costs $2/M input tokens. Grok 3 Beta is $0.50/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-4o (Omni) vs Grok 3 Beta votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 2 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

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

GPT-4o (Omni) is developed by OpenAI while Grok 3 Beta is developed by xAI. GPT-4o (Omni) has a 128K token context window vs Grok 3 Beta's 131K. These results are based on blind head-to-head voting across 54 challenges.

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

Based on 2 community votes on Rival, GPT-4o (Omni) and Grok 3 Beta are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 54 challenges to decide.

How much does GPT-4o (Omni) cost compared to Grok 3 Beta?

GPT-4o (Omni) costs $2.5/M input tokens and Grok 3 Beta costs $2/M input tokens. Grok 3 Beta is $0.50/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are GPT-4o (Omni) vs Grok 3 Beta votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 2 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

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

Updated Apr 2025

Our Verdict

Grok 3 BetaWinner

GPT-4o (Omni)Runner-up

Votes are tied. Grok 3 Beta is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Grok 3 Beta

Input

$2.00

1.3× cheaper

Output

$4.00

2.5× cheaper

Grok 3 Beta is cheaper on both — 1.3× input, 2.5× output

Writing DNA

Style Comparison

Similarity

72%

GPT-4o (Omni) uses 2.5x more emoji

GPT-4o (Omni)

Grok 3 Beta

54%Vocabulary48%

18wSentence Length19w

0.72Hedging0.67

7.3Bold3.1

5.6Lists5.5

0.03Emoji0.00

1.40Headings0.52

0.26Transitions0.28

Based on 24 + 23 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Grok 3 Beta 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

Grok 3 Beta vs Llama 4 MaverickNew provider

Grok 3 Beta vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider

Updated Apr 2025

Our Verdict

Grok 3 BetaWinner

GPT-4o (Omni)Runner-up

Votes are tied. Grok 3 Beta is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Grok 3 Beta

Input

$2.00

1.3× cheaper

Output

$4.00

2.5× cheaper

Grok 3 Beta is cheaper on both — 1.3× input, 2.5× output

Writing DNA

Style Comparison

Similarity

72%

GPT-4o (Omni) uses 2.5x more emoji

GPT-4o (Omni)

Grok 3 Beta

54%Vocabulary48%

18wSentence Length19w

0.72Hedging0.67

7.3Bold3.1

5.6Lists5.5

0.03Emoji0.00

1.40Headings0.52

0.26Transitions0.28

Based on 24 + 23 text responses

Research

What we learned reading every model

GPT-4o (Omni) and Grok 3 Beta 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

Grok 3 Beta vs Llama 4 MaverickNew provider

Grok 3 Beta vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider