What is the difference between Claude 3.7 Sonnet and GPT-5.1-Codex-Mini?

Claude 3.7 Sonnet is developed by Anthropic while GPT-5.1-Codex-Mini is developed by OpenAI. Claude 3.7 Sonnet has a 200K token context window vs GPT-5.1-Codex-Mini's 400K. You can compare their actual outputs across 55 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Sonnet or GPT-5.1-Codex-Mini?

It depends on your use case. Claude 3.7 Sonnet and GPT-5.1-Codex-Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 55 challenges so you can judge which fits your needs best.

How much does Claude 3.7 Sonnet cost compared to GPT-5.1-Codex-Mini?

Claude 3.7 Sonnet costs $3/M input tokens and GPT-5.1-Codex-Mini costs $1.5/M input tokens. GPT-5.1-Codex-Mini is $1.50/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 GPT-5.1-Codex-Mini on Rival?

This page shows a side-by-side comparison of Claude 3.7 Sonnet and GPT-5.1-Codex-Mini 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 GPT-5.1-Codex-Mini?

Claude 3.7 Sonnet is developed by Anthropic while GPT-5.1-Codex-Mini is developed by OpenAI. Claude 3.7 Sonnet has a 200K token context window vs GPT-5.1-Codex-Mini's 400K. You can compare their actual outputs across 55 challenges on Rival to see how they differ in practice.

Which is better, Claude 3.7 Sonnet or GPT-5.1-Codex-Mini?

It depends on your use case. Claude 3.7 Sonnet and GPT-5.1-Codex-Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 55 challenges so you can judge which fits your needs best.

How much does Claude 3.7 Sonnet cost compared to GPT-5.1-Codex-Mini?

Claude 3.7 Sonnet costs $3/M input tokens and GPT-5.1-Codex-Mini costs $1.5/M input tokens. GPT-5.1-Codex-Mini is $1.50/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 GPT-5.1-Codex-Mini on Rival?

This page shows a side-by-side comparison of Claude 3.7 Sonnet and GPT-5.1-Codex-Mini 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 GPT-5.1-Codex-Mini: Which Is Better?

Updated Nov 2025

Our Verdict

GPT-5.1-Codex-Mini

Claude 3.7 SonnetRunner-up

No community votes yet. On paper, GPT-5.1-Codex-Mini 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

Output

$15.00

GPT-5.1-Codex-Mini

Input

$1.50

2.0× cheaper

Output

$6.00

2.5× cheaper

GPT-5.1-Codex-Mini is cheaper on both — 2.0× input, 2.5× output

Writing DNA

Style Comparison

Similarity

59%

Claude 3.7 Sonnet uses 23.0x more headings

Claude 3.7 Sonnet

GPT-5.1-Codex-Mini

62%Vocabulary65%

35wSentence Length20w

0.99Hedging0.56

1.2Bold3.3

4.3Lists3.4

0.00Emoji0.00

1.78Headings0.08

0.23Transitions0.05

Based on 13 + 13 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and GPT-5.1-Codex-Mini 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 Grok 3New provider

Updated Nov 2025

Our Verdict

GPT-5.1-Codex-Mini

Claude 3.7 SonnetRunner-up

No community votes yet. On paper, GPT-5.1-Codex-Mini 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

Output

$15.00

GPT-5.1-Codex-Mini

Input

$1.50

2.0× cheaper

Output

$6.00

2.5× cheaper

GPT-5.1-Codex-Mini is cheaper on both — 2.0× input, 2.5× output

Writing DNA

Style Comparison

Similarity

59%

Claude 3.7 Sonnet uses 23.0x more headings

Claude 3.7 Sonnet

GPT-5.1-Codex-Mini

62%Vocabulary65%

35wSentence Length20w

0.99Hedging0.56

1.2Bold3.3

4.3Lists3.4

0.00Emoji0.00

1.78Headings0.08

0.23Transitions0.05

Based on 13 + 13 text responses

Research

What we learned reading every model

Claude 3.7 Sonnet and GPT-5.1-Codex-Mini 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 Grok 3New provider