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

Both are developed by Anthropic but target different use cases. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Claude 3.7 Thinking Sonnet and Claude Opus 4.5 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 can I compare Claude 3.7 Thinking Sonnet and Claude Opus 4.5 on Rival?

This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet and Claude Opus 4.5 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 Thinking Sonnet and Claude Opus 4.5?

Both are developed by Anthropic but target different use cases. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

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

It depends on your use case. Claude 3.7 Thinking Sonnet and Claude Opus 4.5 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 can I compare Claude 3.7 Thinking Sonnet and Claude Opus 4.5 on Rival?

This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet and Claude Opus 4.5 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 Thinking Sonnet vs Claude Opus 4.5: Which Is Better?

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Claude 3.7 Thinking SonnetRunner-up

No community votes yet. On paper, Claude Opus 4.5 has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

Output

$30.00

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

64%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3.7 Thinking Sonnet

Claude Opus 4.5

61%Vocabulary64%

49wSentence Length55w

0.64Hedging0.86

2.2Bold5.8

4.5Lists4.5

0.00Emoji0.15

1.81Headings1.59

0.21Transitions0.05

Based on 21 + 24 text responses

Research

What we learned reading every model

Claude 3.7 Thinking 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 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs Llama 4 MaverickNew provider

Claude 3.7 Thinking Sonnet vs GPT-5New provider

Updated Nov 2025

Our Verdict

Claude Opus 4.5

Claude 3.7 Thinking SonnetRunner-up

No community votes yet. On paper, Claude Opus 4.5 has the edge — bigger model tier, newer.

Too close to call

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

Output

$30.00

Claude Opus 4.5

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

64%

Claude Opus 4.5 uses 15.2x more emoji

Claude 3.7 Thinking Sonnet

Claude Opus 4.5

61%Vocabulary64%

49wSentence Length55w

0.64Hedging0.86

2.2Bold5.8

4.5Lists4.5

0.00Emoji0.15

1.81Headings1.59

0.21Transitions0.05

Based on 21 + 24 text responses

Research

What we learned reading every model

Claude 3.7 Thinking 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 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs Llama 4 MaverickNew provider

Claude 3.7 Thinking Sonnet vs GPT-5New provider