What is the difference between Claude Sonnet 4 and GPT-4o (Omni)?

Claude Sonnet 4 is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-4o (Omni)'s 128K. These results are based on blind head-to-head voting across 54 challenges.

Which is better, Claude Sonnet 4 or GPT-4o (Omni)?

Based on 3 community votes on Rival, Claude Sonnet 4 and GPT-4o (Omni) 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 Claude Sonnet 4 cost compared to GPT-4o (Omni)?

Claude Sonnet 4 costs $3/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. GPT-4o (Omni) 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 Claude Sonnet 4 vs GPT-4o (Omni) 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. 3 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 Claude Sonnet 4 and GPT-4o (Omni)?

Claude Sonnet 4 is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-4o (Omni)'s 128K. These results are based on blind head-to-head voting across 54 challenges.

Which is better, Claude Sonnet 4 or GPT-4o (Omni)?

Based on 3 community votes on Rival, Claude Sonnet 4 and GPT-4o (Omni) 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 Claude Sonnet 4 cost compared to GPT-4o (Omni)?

Claude Sonnet 4 costs $3/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. GPT-4o (Omni) 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 Claude Sonnet 4 vs GPT-4o (Omni) 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. 3 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

Claude Sonnet 4 vs GPT-4o (Omni): Which Is Better?

Updated May 2025

Our Verdict

Claude Sonnet 4Winner

GPT-4o (Omni)Runner-up

Votes are tied. Claude Sonnet 4 is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 4

Input

$3.00

Output

$15.00

GPT-4o (Omni)

Input

$2.50

1.2× cheaper

Output

$10.00

1.5× cheaper

GPT-4o (Omni) is cheaper on both — 1.2× input, 1.5× output

Writing DNA

Style Comparison

Similarity

56%

Claude Sonnet 4 uses 35.0x more emoji

Claude Sonnet 4

GPT-4o (Omni)

62%Vocabulary54%

111wSentence Length18w

0.40Hedging0.72

5.0Bold7.3

9.3Lists5.6

0.88Emoji0.03

2.16Headings1.40

0.33Transitions0.26

Based on 17 + 24 text responses

Research

What we learned reading every model

Claude Sonnet 4 and GPT-4o (Omni) 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

Claude Sonnet 4 vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider

Claude Sonnet 4 vs Llama 4 MaverickNew provider

Updated May 2025

Our Verdict

Claude Sonnet 4Winner

GPT-4o (Omni)Runner-up

Votes are tied. Claude Sonnet 4 is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

Claude Sonnet 4

Input

$3.00

Output

$15.00

GPT-4o (Omni)

Input

$2.50

1.2× cheaper

Output

$10.00

1.5× cheaper

GPT-4o (Omni) is cheaper on both — 1.2× input, 1.5× output

Writing DNA

Style Comparison

Similarity

56%

Claude Sonnet 4 uses 35.0x more emoji

Claude Sonnet 4

GPT-4o (Omni)

62%Vocabulary54%

111wSentence Length18w

0.40Hedging0.72

5.0Bold7.3

9.3Lists5.6

0.88Emoji0.03

2.16Headings1.40

0.33Transitions0.26

Based on 17 + 24 text responses

Research

What we learned reading every model

Claude Sonnet 4 and GPT-4o (Omni) 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

Claude Sonnet 4 vs GPT-5Cross-provider

GPT-4o (Omni) vs MiniMax M3New provider

Claude Sonnet 4 vs Llama 4 MaverickNew provider