What is the difference between Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro?

Claude 3.7 Thinking Sonnet is developed by Anthropic while GPT-5.6 Luna Pro is developed by OpenAI. Claude 3.7 Thinking Sonnet has a 200K token context window vs GPT-5.6 Luna Pro's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Thinking Sonnet or GPT-5.6 Luna Pro?

It depends on your use case. Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro 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 3.7 Thinking Sonnet cost compared to GPT-5.6 Luna Pro?

Claude 3.7 Thinking Sonnet costs $6/M input tokens and GPT-5.6 Luna Pro costs $1/M input tokens. GPT-5.6 Luna Pro is $5.00/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 Thinking Sonnet and GPT-5.6 Luna Pro on Rival?

This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro 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 GPT-5.6 Luna Pro?

Claude 3.7 Thinking Sonnet is developed by Anthropic while GPT-5.6 Luna Pro is developed by OpenAI. Claude 3.7 Thinking Sonnet has a 200K token context window vs GPT-5.6 Luna Pro's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Thinking Sonnet or GPT-5.6 Luna Pro?

It depends on your use case. Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro 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 3.7 Thinking Sonnet cost compared to GPT-5.6 Luna Pro?

Claude 3.7 Thinking Sonnet costs $6/M input tokens and GPT-5.6 Luna Pro costs $1/M input tokens. GPT-5.6 Luna Pro is $5.00/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 Thinking Sonnet and GPT-5.6 Luna Pro on Rival?

This page shows a side-by-side comparison of Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro 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 GPT-5.6 Luna Pro: Which Is Better?

Updated Jul 2026

Our Verdict

Claude 3.7 Thinking Sonnet

GPT-5.6 Luna Pro

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

GPT-5.6 Luna Pro is 5.0x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

Output

$30.00

GPT-5.6 Luna Pro

Input

$1.00

6.0× cheaper

Output

$6.00

5.0× cheaper

GPT-5.6 Luna Pro is cheaper on both — 6.0× input, 5.0× output

Writing DNA

Style Comparison

Similarity

66%

GPT-5.6 Luna Pro uses 53.7x more emoji

Claude 3.7 Thinking Sonnet

GPT-5.6 Luna Pro

61%Vocabulary58%

49wSentence Length18w

0.64Hedging0.81

2.2Bold2.9

4.5Lists5.1

0.00Emoji0.54

1.81Headings1.10

0.21Transitions0.09

Based on 21 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3.7 Thinking Sonnet vs Ox AlphaNew provider

Claude 3.7 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs GPT-5Cross-provider

Updated Jul 2026

Our Verdict

Claude 3.7 Thinking Sonnet

GPT-5.6 Luna Pro

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

GPT-5.6 Luna Pro is 5.0x cheaper per token — worth considering if cost matters.

Too close to call

What do Claude 3.7 Thinking Sonnet and GPT-5.6 Luna Pro say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

Claude 3.7 Thinking Sonnet

Input

$6.00

Output

$30.00

GPT-5.6 Luna Pro

Input

$1.00

6.0× cheaper

Output

$6.00

5.0× cheaper

GPT-5.6 Luna Pro is cheaper on both — 6.0× input, 5.0× output

Writing DNA

Style Comparison

Similarity

66%

GPT-5.6 Luna Pro uses 53.7x more emoji

Claude 3.7 Thinking Sonnet

GPT-5.6 Luna Pro

61%Vocabulary58%

49wSentence Length18w

0.64Hedging0.81

2.2Bold2.9

4.5Lists5.1

0.00Emoji0.54

1.81Headings1.10

0.21Transitions0.09

Based on 21 + 27 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Claude 3.7 Thinking Sonnet vs Ox AlphaNew provider

Claude 3.7 Thinking Sonnet vs MiniMax M3New provider

Claude 3.7 Thinking Sonnet vs GPT-5Cross-provider