DeepSeek V4 Flash 0731 vs OpenAI o3
Compare DeepSeek V4 Flash 0731 by DeepSeek against OpenAI o3 by OpenAI, tested across 42 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
OpenAI o3
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 143x 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
71× cheaper
Output
$0.28
143× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
DeepSeek V4 Flash 0731 is cheaper on both — 71× input, 143× output
Writing DNA
Style Comparison
Similarity
41%
DeepSeek V4 Flash 0731 uses 8.2x more bold
DeepSeek V4 Flash 0731
OpenAI o3
52%Vocabulary68%
18wSentence Length14w
0.38Hedging0.26
5.7Bold0.7
3.4Lists3.0
0.00Emoji0.00
0.83Headings0.38
0.04Transitions0.12
Based on 23 + 16 text responses
Research
What we learned reading every model
FAQ
