DeepSeek V4 Flash 0731 vs GPT-5.1 Chat
Compare DeepSeek V4 Flash 0731 by DeepSeek against GPT-5.1 Chat by OpenAI, context windows of 1.0M vs 128K, tested across 41 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
GPT-5.1 ChatRunner-up
No community votes yet. On paper, DeepSeek V4 Flash 0731 has the edge — newer, bigger context window.
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 Chat
Input
$1.25
Output
$10.00
DeepSeek V4 Flash 0731 is cheaper on both — 8.9× input, 36× output
Writing DNA
Style Comparison
Similarity
39%
DeepSeek V4 Flash 0731 uses 83.0x more headings
DeepSeek V4 Flash 0731
GPT-5.1 Chat
52%Vocabulary73%
18wSentence Length18w
0.38Hedging0.45
5.7Bold1.1
3.4Lists2.4
0.00Emoji0.00
0.83Headings0.00
0.04Transitions0.06
Based on 23 + 15 text responses
Research
What we learned reading every model
FAQ
