DeepSeek R1 vs GPT-5.1 Codex Max
Compare DeepSeek R1 by DeepSeek against GPT-5.1 Codex Max by OpenAI, tested across 52 shared challenges. Updated April 2026.
Which is better, DeepSeek R1 or GPT-5.1 Codex Max?
DeepSeek R1 and GPT-5.1 Codex Max are both competitive models. Compare their real outputs side by side below.
Key Differences Between DeepSeek R1 and GPT-5.1 Codex Max
DeepSeek R1 is made by deepseek while GPT-5.1 Codex Max is from openai.
API pricing
Per 1M tokens
DeepSeek R1
Input
$0.55
Output
$2.19
GPT-5.1 Codex Max
Input
—
Output
—
Our Verdict
GPT-5.1 Codex Max
DeepSeek R1Runner-up
No community votes yet. On paper, GPT-5.1 Codex Max has the edge — bigger model tier, newer.
Too close to call
Writing DNA
Style Comparison
Similarity
21%
DeepSeek R1 uses 4.3x more emoji
DeepSeek R1
GPT-5.1 Codex Max
62%Vocabulary60%
15wSentence Length16w
0.52Hedging0.36
8.0Bold2.3
5.7Lists4.2
0.04Emoji0.00
0.62Headings0.12
0.28Transitions0.03
Based on 22 + 13 text responses
FAQ
