DeepSeek V4 Flash 0731 vs GPT-5.1-Codex-Mini
Compare DeepSeek V4 Flash 0731 by DeepSeek against GPT-5.1-Codex-Mini by OpenAI, context windows of 1.0M vs 400K, tested across 42 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
GPT-5.1-Codex-Mini
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
DeepSeek V4 Flash 0731 is 21x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Flash 0731
Input
$0.14
11× cheaper
Output
$0.28
21× cheaper
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
DeepSeek V4 Flash 0731 is cheaper on both — 11× input, 21× output
Writing DNA
Style Comparison
Similarity
41%
DeepSeek V4 Flash 0731 uses 10.7x more headings
DeepSeek V4 Flash 0731
GPT-5.1-Codex-Mini
52%Vocabulary65%
18wSentence Length20w
0.38Hedging0.56
5.7Bold3.3
3.4Lists3.4
0.00Emoji0.00
0.83Headings0.08
0.04Transitions0.05
Based on 23 + 13 text responses
Research
What we learned reading every model
FAQ
