What is the difference between DeepSeek R1 and GPT-5.1-Codex-Mini?

DeepSeek R1 is developed by DeepSeek while GPT-5.1-Codex-Mini is developed by OpenAI. DeepSeek R1 has a 128K token context window vs GPT-5.1-Codex-Mini's 400K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 or GPT-5.1-Codex-Mini?

It depends on your use case. DeepSeek R1 and GPT-5.1-Codex-Mini 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 much does DeepSeek R1 cost compared to GPT-5.1-Codex-Mini?

DeepSeek R1 costs $0.55/M input tokens and GPT-5.1-Codex-Mini costs $1.5/M input tokens. DeepSeek R1 is $0.95/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 DeepSeek R1 and GPT-5.1-Codex-Mini on Rival?

This page shows a side-by-side comparison of DeepSeek R1 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 DeepSeek R1 and GPT-5.1-Codex-Mini?

DeepSeek R1 is developed by DeepSeek while GPT-5.1-Codex-Mini is developed by OpenAI. DeepSeek R1 has a 128K token context window vs GPT-5.1-Codex-Mini's 400K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 or GPT-5.1-Codex-Mini?

It depends on your use case. DeepSeek R1 and GPT-5.1-Codex-Mini 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 much does DeepSeek R1 cost compared to GPT-5.1-Codex-Mini?

DeepSeek R1 costs $0.55/M input tokens and GPT-5.1-Codex-Mini costs $1.5/M input tokens. DeepSeek R1 is $0.95/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 DeepSeek R1 and GPT-5.1-Codex-Mini on Rival?

This page shows a side-by-side comparison of DeepSeek R1 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.

DeepSeek R1 vs GPT-5.1-Codex-Mini: Which Is Better?

Updated Nov 2025

Our Verdict

GPT-5.1-Codex-Mini

DeepSeek R1Runner-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

DeepSeek R1

Input

$0.55

2.7× cheaper

Output

$2.19

2.7× cheaper

GPT-5.1-Codex-Mini

Input

$1.50

Output

$6.00

DeepSeek R1 is cheaper on both — 2.7× input, 2.7× output

Writing DNA

Style Comparison

Similarity

43%

DeepSeek R1 uses 4.3x more emoji

DeepSeek R1

GPT-5.1-Codex-Mini

62%Vocabulary65%

15wSentence Length20w

0.52Hedging0.56

8.0Bold3.3

5.7Lists3.4

0.04Emoji0.00

0.62Headings0.08

0.28Transitions0.05

Based on 22 + 13 text responses

Research

What we learned reading every model

DeepSeek R1 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

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DeepSeek R1 vs Grok 3New provider

DeepSeek R1 vs Llama 4 MaverickNew provider

Updated Nov 2025

Our Verdict

GPT-5.1-Codex-Mini

DeepSeek R1Runner-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

DeepSeek R1

Input

$0.55

2.7× cheaper

Output

$2.19

2.7× cheaper

GPT-5.1-Codex-Mini

Input

$1.50

Output

$6.00

DeepSeek R1 is cheaper on both — 2.7× input, 2.7× output

Writing DNA

Style Comparison

Similarity

43%

DeepSeek R1 uses 4.3x more emoji

DeepSeek R1

GPT-5.1-Codex-Mini

62%Vocabulary65%

15wSentence Length20w

0.52Hedging0.56

8.0Bold3.3

5.7Lists3.4

0.04Emoji0.00

0.62Headings0.08

0.28Transitions0.05

Based on 22 + 13 text responses

Research

What we learned reading every model

DeepSeek R1 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

DeepSeek R1 vs MiniMax M3New provider

DeepSeek R1 vs Grok 3New provider

DeepSeek R1 vs Llama 4 MaverickNew provider