What is the difference between Claude 3.7 Sonnet and Claude Opus 5?

Both are developed by Anthropic but target different use cases. Claude 3.7 Sonnet has a 200K token context window vs Claude Opus 5's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Sonnet or Claude Opus 5?

It depends on your use case. Claude 3.7 Sonnet and Claude Opus 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude 3.7 Sonnet cost compared to Claude Opus 5?

Claude 3.7 Sonnet costs $3/M input tokens and Claude Opus 5 costs $5/M input tokens. Claude 3.7 Sonnet is $2.00/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 3.7 Sonnet and Claude Opus 5 on Rival?

This page shows a side-by-side comparison of Claude 3.7 Sonnet and Claude Opus 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 3.7 Sonnet and Claude Opus 5?

Both are developed by Anthropic but target different use cases. Claude 3.7 Sonnet has a 200K token context window vs Claude Opus 5's 1.0M. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Sonnet or Claude Opus 5?

It depends on your use case. Claude 3.7 Sonnet and Claude Opus 5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Claude 3.7 Sonnet cost compared to Claude Opus 5?

Claude 3.7 Sonnet costs $3/M input tokens and Claude Opus 5 costs $5/M input tokens. Claude 3.7 Sonnet is $2.00/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 3.7 Sonnet and Claude Opus 5 on Rival?

This page shows a side-by-side comparison of Claude 3.7 Sonnet and Claude Opus 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 3.7 Sonnet vs Claude Opus 5: Which Is Better?

Updated Jul 2026

Our Verdict

Claude Opus 5

Claude 3.7 SonnetRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude 3.7 Sonnet

Input

$3.00

1.7× cheaper

Output

$15.00

1.7× cheaper

Claude Opus 5

Input

$5.00

Output

$25.00

Claude 3.7 Sonnet is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

45%

Claude Opus 5 uses 1.7x more emoji

Claude 3.7 Sonnet

Claude Opus 5

62%Vocabulary54%

35wSentence Length21w

0.99Hedging0.40

1.2Bold3.9

4.3Lists1.9

0.00Emoji0.02

1.78Headings0.71

0.23Transitions0.05

Based on 13 + 27 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and Claude Opus 5 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 3.7 Sonnet vs MiniMax M3New provider

Claude 3.7 Sonnet vs GPT-5New provider

Claude 3.7 Sonnet vs Llama 4 MaverickNew provider

Updated Jul 2026

Our Verdict

Claude Opus 5

Claude 3.7 SonnetRunner-up

No community votes yet. On paper, Claude Opus 5 has the edge — bigger model tier, newer, bigger context window.

Slight edge

API pricing

Cost per 1M tokens

Claude 3.7 Sonnet

Input

$3.00

1.7× cheaper

Output

$15.00

1.7× cheaper

Claude Opus 5

Input

$5.00

Output

$25.00

Claude 3.7 Sonnet is cheaper on both — 1.7× input, 1.7× output

Writing DNA

Style Comparison

Similarity

45%

Claude Opus 5 uses 1.7x more emoji

Claude 3.7 Sonnet

Claude Opus 5

62%Vocabulary54%

35wSentence Length21w

0.99Hedging0.40

1.2Bold3.9

4.3Lists1.9

0.00Emoji0.02

1.78Headings0.71

0.23Transitions0.05

Based on 13 + 27 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and Claude Opus 5 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 3.7 Sonnet vs MiniMax M3New provider

Claude 3.7 Sonnet vs GPT-5New provider

Claude 3.7 Sonnet vs Llama 4 MaverickNew provider