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

Both are developed by OpenAI but target different use cases. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or GPT-5.1 Codex Max?

It depends on your use case. GPT-5.1-Codex and GPT-5.1 Codex Max 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 can I compare GPT-5.1-Codex and GPT-5.1 Codex Max on Rival?

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

Both are developed by OpenAI but target different use cases. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1-Codex or GPT-5.1 Codex Max?

It depends on your use case. GPT-5.1-Codex and GPT-5.1 Codex Max 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 can I compare GPT-5.1-Codex and GPT-5.1 Codex Max on Rival?

This page shows a side-by-side comparison of GPT-5.1-Codex and GPT-5.1 Codex Max 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 vs GPT-5.1 Codex Max: Which Is Better?

Updated Dec 2025

Our Verdict

GPT-5.1-Codex

GPT-5.1 Codex Max

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

Too close to call

What do GPT-5.1-Codex and GPT-5.1 Codex Max say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.1-Codex

Input

$1.25

Output

$10.00

GPT-5.1 Codex Max

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

54%

GPT-5.1-Codex uses 14.7x more transitions

GPT-5.1-Codex

GPT-5.1 Codex Max

70%Vocabulary60%

17wSentence Length16w

0.39Hedging0.36

3.4Bold2.3

3.5Lists4.2

0.00Emoji0.00

0.50Headings0.12

0.38Transitions0.03

Based on 14 + 13 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs MiniMax M3New provider

GPT-5.1-Codex vs Grok 3New provider

GPT-5.1-Codex vs Llama 4 MaverickNew provider

Updated Dec 2025

Our Verdict

GPT-5.1-Codex

GPT-5.1 Codex Max

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

Too close to call

What do GPT-5.1-Codex and GPT-5.1 Codex Max say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.1-Codex

Input

$1.25

Output

$10.00

GPT-5.1 Codex Max

Input

—

Output

—

Writing DNA

Style Comparison

Similarity

54%

GPT-5.1-Codex uses 14.7x more transitions

GPT-5.1-Codex

GPT-5.1 Codex Max

70%Vocabulary60%

17wSentence Length16w

0.39Hedging0.36

3.4Bold2.3

3.5Lists4.2

0.00Emoji0.00

0.50Headings0.12

0.38Transitions0.03

Based on 14 + 13 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

GPT-5.1-Codex vs MiniMax M3New provider

GPT-5.1-Codex vs Grok 3New provider

GPT-5.1-Codex vs Llama 4 MaverickNew provider