What is the difference between GPT-5.1 Codex Max and Mistral Small 4?

GPT-5.1 Codex Max is developed by OpenAI while Mistral Small 4 is developed by Mistral AI. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 Codex Max or Mistral Small 4?

It depends on your use case. GPT-5.1 Codex Max and Mistral Small 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare GPT-5.1 Codex Max and Mistral Small 4 on Rival?

This page shows a side-by-side comparison of GPT-5.1 Codex Max and Mistral Small 4 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 GPT-5.1 Codex Max and Mistral Small 4?

GPT-5.1 Codex Max is developed by OpenAI while Mistral Small 4 is developed by Mistral AI. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 Codex Max or Mistral Small 4?

It depends on your use case. GPT-5.1 Codex Max and Mistral Small 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How can I compare GPT-5.1 Codex Max and Mistral Small 4 on Rival?

This page shows a side-by-side comparison of GPT-5.1 Codex Max and Mistral Small 4 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.

GPT-5.1 Codex Max vs Mistral Small 4: Which Is Better?

Updated Mar 2026

Our Verdict

GPT-5.1 Codex Max

Mistral Small 4Runner-up

No community votes yet. On paper, GPT-5.1 Codex Max has the edge — bigger model tier, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1 Codex Max

Input

—

Output

—

Mistral Small 4

Input

$0.15

Output

$0.60

Writing DNA

Style Comparison

Similarity

23%

Mistral Small 4 uses 19.0x more emoji

GPT-5.1 Codex Max

Mistral Small 4

60%Vocabulary50%

16wSentence Length18w

0.36Hedging0.58

2.3Bold9.0

4.2Lists5.6

0.00Emoji0.19

0.12Headings1.10

0.03Transitions0.12

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5.1 Codex Max and Mistral Small 4 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

Mistral Small 4 vs MiniMax M3New provider

Mistral Small 4 vs Claude Opus 4New provider

Mistral Small 4 vs Gemini 2.5 Pro Preview 06-05New provider

Updated Mar 2026

Our Verdict

GPT-5.1 Codex Max

Mistral Small 4Runner-up

No community votes yet. On paper, GPT-5.1 Codex Max has the edge — bigger model tier, major provider backing.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1 Codex Max

Input

—

Output

—

Mistral Small 4

Input

$0.15

Output

$0.60

Writing DNA

Style Comparison

Similarity

23%

Mistral Small 4 uses 19.0x more emoji

GPT-5.1 Codex Max

Mistral Small 4

60%Vocabulary50%

16wSentence Length18w

0.36Hedging0.58

2.3Bold9.0

4.2Lists5.6

0.00Emoji0.19

0.12Headings1.10

0.03Transitions0.12

Based on 13 + 23 text responses

Research

What we learned reading every model

GPT-5.1 Codex Max and Mistral Small 4 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

Mistral Small 4 vs MiniMax M3New provider

Mistral Small 4 vs Claude Opus 4New provider

Mistral Small 4 vs Gemini 2.5 Pro Preview 06-05New provider