What is the difference between Claude Sonnet 5 and GPT-4o (Omni)?

Claude Sonnet 5 is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude Sonnet 5 has a 1.0M token context window vs GPT-4o (Omni)'s 128K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or GPT-4o (Omni)?

It depends on your use case. Claude Sonnet 5 and GPT-4o (Omni) 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 much does Claude Sonnet 5 cost compared to GPT-4o (Omni)?

Claude Sonnet 5 costs $2/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. Claude Sonnet 5 is $0.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Sonnet 5 and GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 and GPT-4o (Omni) 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 Claude Sonnet 5 and GPT-4o (Omni)?

Claude Sonnet 5 is developed by Anthropic while GPT-4o (Omni) is developed by OpenAI. Claude Sonnet 5 has a 1.0M token context window vs GPT-4o (Omni)'s 128K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 5 or GPT-4o (Omni)?

It depends on your use case. Claude Sonnet 5 and GPT-4o (Omni) 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 much does Claude Sonnet 5 cost compared to GPT-4o (Omni)?

Claude Sonnet 5 costs $2/M input tokens and GPT-4o (Omni) costs $2.5/M input tokens. Claude Sonnet 5 is $0.50/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Sonnet 5 and GPT-4o (Omni) on Rival?

This page shows a side-by-side comparison of Claude Sonnet 5 and GPT-4o (Omni) 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.

Claude Sonnet 5 vs GPT-4o (Omni): Which Is Better?

Updated Jun 2026

Our Verdict

Claude Sonnet 5

GPT-4o (Omni)

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

Claude Sonnet 5

Input

$2.00

1.3× cheaper

Output

$10.00

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Writing DNA

Style Comparison

Similarity

39%

Claude Sonnet 5 uses 31.6x more emoji

Claude Sonnet 5

GPT-4o (Omni)

59%Vocabulary54%

35wSentence Length18w

0.53Hedging0.72

3.5Bold7.3

3.5Lists5.6

0.79Emoji0.03

1.25Headings1.40

0.06Transitions0.26

Based on 27 + 24 text responses

Research

What we learned reading every model

Claude Sonnet 5 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

GPT-4o (Omni) vs MiniMax M3New provider

Claude Sonnet 5 vs GPT-5Cross-provider

Claude Sonnet 5 vs Llama 4 MaverickNew provider

Updated Jun 2026

Our Verdict

Claude Sonnet 5

GPT-4o (Omni)

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

Claude Sonnet 5

Input

$2.00

1.3× cheaper

Output

$10.00

GPT-4o (Omni)

Input

$2.50

Output

$10.00

Writing DNA

Style Comparison

Similarity

39%

Claude Sonnet 5 uses 31.6x more emoji

Claude Sonnet 5

GPT-4o (Omni)

59%Vocabulary54%

35wSentence Length18w

0.53Hedging0.72

3.5Bold7.3

3.5Lists5.6

0.79Emoji0.03

1.25Headings1.40

0.06Transitions0.26

Based on 27 + 24 text responses

Research

What we learned reading every model

Claude Sonnet 5 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

GPT-4o (Omni) vs MiniMax M3New provider

Claude Sonnet 5 vs GPT-5Cross-provider

Claude Sonnet 5 vs Llama 4 MaverickNew provider