What is the difference between Claude 3 Opus and Claude Sonnet 4?

Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Sonnet 4's 200K. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Claude Sonnet 4?

It depends on your use case. Claude 3 Opus and Claude Sonnet 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Claude Sonnet 4?

Claude 3 Opus costs $15/M input tokens and Claude Sonnet 4 costs $3/M input tokens. Claude Sonnet 4 is $12.00/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 3 Opus and Claude Sonnet 4 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Claude Sonnet 4 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 3 Opus and Claude Sonnet 4?

Both are developed by Anthropic but target different use cases. Claude 3 Opus has a 200K token context window vs Claude Sonnet 4's 200K. You can compare their actual outputs across 12 challenges on Rival to see how they differ in practice.

Which is better, Claude 3 Opus or Claude Sonnet 4?

It depends on your use case. Claude 3 Opus and Claude Sonnet 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 12 challenges so you can judge which fits your needs best.

How much does Claude 3 Opus cost compared to Claude Sonnet 4?

Claude 3 Opus costs $15/M input tokens and Claude Sonnet 4 costs $3/M input tokens. Claude Sonnet 4 is $12.00/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 3 Opus and Claude Sonnet 4 on Rival?

This page shows a side-by-side comparison of Claude 3 Opus and Claude Sonnet 4 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 3 Opus vs Claude Sonnet 4: Which Is Better?

Updated May 2025

Our Verdict

Claude 3 Opus

Claude Sonnet 4

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

Claude Sonnet 4 is 5.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

Claude Sonnet 4

Input

$3.00

5.0× cheaper

Output

$15.00

5.0× cheaper

Claude Sonnet 4 is cheaper on both — 5.0× input, 5.0× output

Writing DNA

Style Comparison

Similarity

37%

Claude Sonnet 4 uses 503.7x more bold

Claude 3 Opus

Claude Sonnet 4

54%Vocabulary62%

14wSentence Length111w

0.48Hedging0.40

0.0Bold5.0

3.0Lists9.3

0.00Emoji0.88

0.00Headings2.16

0.06Transitions0.33

Based on 3 + 17 text responses

Research

What we learned reading every model

Claude 3 Opus and Claude Sonnet 4 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 3 Opus vs GPT-5New provider

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs Llama 4 MaverickNew provider

Updated May 2025

Our Verdict

Claude 3 Opus

Claude Sonnet 4

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

Claude Sonnet 4 is 5.0x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude 3 Opus

Input

$15.00

Output

$75.00

Claude Sonnet 4

Input

$3.00

5.0× cheaper

Output

$15.00

5.0× cheaper

Claude Sonnet 4 is cheaper on both — 5.0× input, 5.0× output

Writing DNA

Style Comparison

Similarity

37%

Claude Sonnet 4 uses 503.7x more bold

Claude 3 Opus

Claude Sonnet 4

54%Vocabulary62%

14wSentence Length111w

0.48Hedging0.40

0.0Bold5.0

3.0Lists9.3

0.00Emoji0.88

0.00Headings2.16

0.06Transitions0.33

Based on 3 + 17 text responses

Research

What we learned reading every model

Claude 3 Opus and Claude Sonnet 4 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 3 Opus vs GPT-5New provider

Claude 3 Opus vs MiniMax M3New provider

Claude 3 Opus vs Llama 4 MaverickNew provider