What is the difference between Claude 3.7 Thinking Sonnet and Claude Opus 4.1?

Both are developed by Anthropic but target different use cases. Claude 3.7 Thinking Sonnet has a 200K token context window vs Claude Opus 4.1's 200K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude 3.7 Thinking Sonnet or Claude Opus 4.1?

Based on 2 community votes on Rival, Claude 3.7 Thinking Sonnet and Claude Opus 4.1 are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does Claude 3.7 Thinking Sonnet cost compared to Claude Opus 4.1?

Claude 3.7 Thinking Sonnet costs $6/M input tokens and Claude Opus 4.1 costs $15/M input tokens. Claude 3.7 Thinking Sonnet is $9.00/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are Claude 3.7 Thinking Sonnet vs Claude Opus 4.1 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. 2 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

What is the difference between Claude 3.7 Thinking Sonnet and Claude Opus 4.1?

Both are developed by Anthropic but target different use cases. Claude 3.7 Thinking Sonnet has a 200K token context window vs Claude Opus 4.1's 200K. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude 3.7 Thinking Sonnet or Claude Opus 4.1?

Based on 2 community votes on Rival, Claude 3.7 Thinking Sonnet and Claude Opus 4.1 are closely matched with similar win rates. The better choice depends on your specific use case. Compare their real outputs side-by-side across 53 challenges to decide.

How much does Claude 3.7 Thinking Sonnet cost compared to Claude Opus 4.1?

Claude 3.7 Thinking Sonnet costs $6/M input tokens and Claude Opus 4.1 costs $15/M input tokens. Claude 3.7 Thinking Sonnet is $9.00/M cheaper per input. The more expensive model wins 50% of duels, so the premium may be justified by quality.

How are Claude 3.7 Thinking Sonnet vs Claude Opus 4.1 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. 2 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Claude 3.7 Thinking Sonnet vs Claude Opus 4.1: Which Is Better?

Updated Aug 2025

Our Verdict

Claude Opus 4.1Winner

Claude 3.7 Thinking SonnetRunner-up

Votes are tied. Claude Opus 4.1 is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

2.5× cheaper

Output

$30.00

2.5× cheaper

Claude Opus 4.1

Input

$15.00

Output

$75.00

Claude 3.7 Thinking Sonnet is cheaper on both — 2.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

82%

Claude Opus 4.1 uses 38.4x more emoji

Claude 3.7 Thinking Sonnet

Claude Opus 4.1

61%Vocabulary61%

49wSentence Length87w

0.64Hedging0.54

2.2Bold5.1

4.5Lists6.7

0.00Emoji0.38

1.81Headings1.68

0.21Transitions0.13

Based on 21 + 17 text responses

Research

What we learned reading every model

Claude 3.7 Thinking Sonnet and Claude Opus 4.1 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 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs GPT-5New provider

Claude 3.7 Thinking Sonnet vs Llama 4 MaverickNew provider

Updated Aug 2025

Our Verdict

Claude Opus 4.1Winner

Claude 3.7 Thinking SonnetRunner-up

Votes are tied. Claude Opus 4.1 is newer and likely incorporates more recent improvements.

Too close to call

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

2.5× cheaper

Output

$30.00

2.5× cheaper

Claude Opus 4.1

Input

$15.00

Output

$75.00

Claude 3.7 Thinking Sonnet is cheaper on both — 2.5× input, 2.5× output

Writing DNA

Style Comparison

Similarity

82%

Claude Opus 4.1 uses 38.4x more emoji

Claude 3.7 Thinking Sonnet

Claude Opus 4.1

61%Vocabulary61%

49wSentence Length87w

0.64Hedging0.54

2.2Bold5.1

4.5Lists6.7

0.00Emoji0.38

1.81Headings1.68

0.21Transitions0.13

Based on 21 + 17 text responses

Research

What we learned reading every model

Claude 3.7 Thinking Sonnet and Claude Opus 4.1 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 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs GPT-5New provider

Claude 3.7 Thinking Sonnet vs Llama 4 MaverickNew provider