DeepSeek V4 Flash 0731 vs OpenAI o4-mini
Compare DeepSeek V4 Flash 0731 by DeepSeek against OpenAI o4-mini by OpenAI, tested across 42 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
OpenAI o4-miniRunner-up
No community votes yet. On paper, DeepSeek V4 Flash 0731 has the edge — bigger model tier, newer, bigger context window.
DeepSeek V4 Flash 0731 is 16x 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
7.9× cheaper
Output
$0.28
16× cheaper
OpenAI o4-mini
Input
$1.10
Output
$4.40
DeepSeek V4 Flash 0731 is cheaper on both — 7.9× input, 16× output
Writing DNA
Style Comparison
Similarity
49%
DeepSeek V4 Flash 0731 uses 568.3x more bold
DeepSeek V4 Flash 0731
OpenAI o4-mini
52%Vocabulary73%
18wSentence Length15w
0.38Hedging0.18
5.7Bold0.0
3.4Lists2.1
0.00Emoji0.00
0.83Headings0.00
0.04Transitions0.02
Based on 23 + 10 text responses
Research
What we learned reading every model
FAQ
