DeepSeek V4 Flash 0731 vs GPT-5.1
Compare DeepSeek V4 Flash 0731 by DeepSeek against GPT-5.1 by OpenAI, context windows of 1.0M vs 400K, tested across 40 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
GPT-5.1
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 36x 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
8.9× cheaper
Output
$0.28
36× cheaper
GPT-5.1
Input
$1.25
Output
$10.00
DeepSeek V4 Flash 0731 is cheaper on both — 8.9× input, 36× output
Writing DNA
Style Comparison
Similarity
59%
GPT-5.1 uses 2.1x more lists
DeepSeek V4 Flash 0731
GPT-5.1
52%Vocabulary62%
18wSentence Length19w
0.38Hedging0.29
5.7Bold3.5
3.4Lists7.2
0.00Emoji0.00
0.83Headings0.61
0.04Transitions0.03
Based on 23 + 14 text responses
Research
What we learned reading every model
FAQ
