What is the difference between Claude 3.7 Sonnet and Claude Opus 4.5?

Both are developed by Anthropic but target different use cases. in 3 community votes on Rival, Claude Opus 4.5 wins 67% of head-to-head matchups. These results are based on blind head-to-head voting across 54 challenges.

Which is better, Claude 3.7 Sonnet or Claude Opus 4.5?

Based on 3 community votes on Rival, Claude Opus 4.5 wins 67% of head-to-head matchups against Claude 3.7 Sonnet.

How are Claude 3.7 Sonnet vs Claude Opus 4.5 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. 3 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

What is the difference between Claude 3.7 Sonnet and Claude Opus 4.5?

Both are developed by Anthropic but target different use cases. in 3 community votes on Rival, Claude Opus 4.5 wins 67% of head-to-head matchups. These results are based on blind head-to-head voting across 54 challenges.

Which is better, Claude 3.7 Sonnet or Claude Opus 4.5?

Based on 3 community votes on Rival, Claude Opus 4.5 wins 67% of head-to-head matchups against Claude 3.7 Sonnet.

How are Claude 3.7 Sonnet vs Claude Opus 4.5 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. 3 votes have been collected for this pair across 54 challenges. All vote data is part of Rival's open dataset.

Claude 3.7 Sonnet vs Claude Opus 4.5: Which Is Better?

Updated Nov 2025

Our Verdict

Claude Opus 4.5Winner

Claude 3.7 SonnetRunner-up

Pick Claude Opus 4.5. In 3 blind votes, Claude Opus 4.5 wins 67% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

Claude 3.7 Sonnet

Input

$3.00

Output

$15.00

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

63%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3.7 Sonnet

Claude Opus 4.5

62%Vocabulary64%

35wSentence Length55w

0.99Hedging0.86

1.2Bold5.8

4.3Lists4.5

0.00Emoji0.15

1.78Headings1.59

0.23Transitions0.05

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and Claude Opus 4.5 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 Llama 4 MaverickNew provider

Claude 3.7 Sonnet vs GPT-5New provider

Updated Nov 2025

Our Verdict

Claude Opus 4.5Winner

Claude 3.7 SonnetRunner-up

Pick Claude Opus 4.5. In 3 blind votes, Claude Opus 4.5 wins 67% of the time. That's not luck.

Clear winner

API pricing

Cost per 1M tokens

Claude 3.7 Sonnet

Input

$3.00

Output

$15.00

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

63%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3.7 Sonnet

Claude Opus 4.5

62%Vocabulary64%

35wSentence Length55w

0.99Hedging0.86

1.2Bold5.8

4.3Lists4.5

0.00Emoji0.15

1.78Headings1.59

0.23Transitions0.05

Based on 13 + 24 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and Claude Opus 4.5 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 Llama 4 MaverickNew provider

Claude 3.7 Sonnet vs GPT-5New provider