What is the difference between Claude Opus 4 and Claude Sonnet 5?

Both are developed by Anthropic but target different use cases. Claude Opus 4 has a 200K token context window vs Claude Sonnet 5's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Claude Sonnet 5?

It depends on your use case. Claude Opus 4 and Claude Sonnet 5 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 Opus 4 cost compared to Claude Sonnet 5?

Claude Opus 4 costs $15/M input tokens and Claude Sonnet 5 costs $2/M input tokens. Claude Sonnet 5 is $13.00/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 Opus 4 and Claude Sonnet 5 on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Claude Sonnet 5 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 Opus 4 and Claude Sonnet 5?

Both are developed by Anthropic but target different use cases. Claude Opus 4 has a 200K token context window vs Claude Sonnet 5's 1.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 4 or Claude Sonnet 5?

It depends on your use case. Claude Opus 4 and Claude Sonnet 5 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 Opus 4 cost compared to Claude Sonnet 5?

Claude Opus 4 costs $15/M input tokens and Claude Sonnet 5 costs $2/M input tokens. Claude Sonnet 5 is $13.00/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 Opus 4 and Claude Sonnet 5 on Rival?

This page shows a side-by-side comparison of Claude Opus 4 and Claude Sonnet 5 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 Opus 4 vs Claude Sonnet 5: Which Is Better?

Updated Jun 2026

Our Verdict

Claude Opus 4

Claude Sonnet 5

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

Claude Sonnet 5 is 7.5x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Claude Sonnet 5

Input

$2.00

7.5× cheaper

Output

$10.00

7.5× cheaper

Claude Sonnet 5 is cheaper on both — 7.5× input, 7.5× output

Writing DNA

Style Comparison

Similarity

46%

Claude Sonnet 5 uses 7.1x more emoji

Claude Opus 4

Claude Sonnet 5

64%Vocabulary59%

62wSentence Length35w

0.52Hedging0.53

4.4Bold3.5

9.1Lists3.5

0.11Emoji0.79

1.87Headings1.25

0.27Transitions0.06

Based on 16 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Opus 4 vs MiniMax M3New provider

Claude Sonnet 5 vs GPT-5New provider

Claude Sonnet 5 vs Claude Sonnet 4Version compare

Updated Jun 2026

Our Verdict

Claude Opus 4

Claude Sonnet 5

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

Claude Sonnet 5 is 7.5x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

Claude Opus 4

Input

$15.00

Output

$75.00

Claude Sonnet 5

Input

$2.00

7.5× cheaper

Output

$10.00

7.5× cheaper

Claude Sonnet 5 is cheaper on both — 7.5× input, 7.5× output

Writing DNA

Style Comparison

Similarity

46%

Claude Sonnet 5 uses 7.1x more emoji

Claude Opus 4

Claude Sonnet 5

64%Vocabulary59%

62wSentence Length35w

0.52Hedging0.53

4.4Bold3.5

9.1Lists3.5

0.11Emoji0.79

1.87Headings1.25

0.27Transitions0.06

Based on 16 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude Opus 4 vs MiniMax M3New provider

Claude Sonnet 5 vs GPT-5New provider

Claude Sonnet 5 vs Claude Sonnet 4Version compare