DeepSeek V3.1 vs OpenAI o4-mini
Compare DeepSeek V3.1 by DeepSeek against OpenAI o4-mini by OpenAI, tested across 54 shared challenges. Updated June 2026.
Which is better, DeepSeek V3.1 or OpenAI o4-mini?
DeepSeek V3.1 and OpenAI o4-mini are both competitive models. DeepSeek V3.1 costs $0.2/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between DeepSeek V3.1 and OpenAI o4-mini
DeepSeek V3.1 is made by deepseek while OpenAI o4-mini is from openai. On pricing, DeepSeek V3.1 costs $0.2/M input tokens vs $1.1/M for OpenAI o4-mini.
Our Verdict
DeepSeek V3.1
OpenAI o4-miniRunner-up
No community votes yet. On paper, DeepSeek V3.1 has the edge — bigger model tier, newer, bigger context window.
DeepSeek V3.1 is 5.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V3.1
Input
$0.20
5.5× cheaper
Output
$0.80
5.5× cheaper
OpenAI o4-mini
Input
$1.10
Output
$4.40
DeepSeek V3.1 is cheaper on both — 5.5× input, 5.5× output
Writing DNA
Style Comparison
Similarity
46%
DeepSeek V3.1 uses 395.2x more bold
DeepSeek V3.1
OpenAI o4-mini
53%Vocabulary73%
14wSentence Length15w
0.42Hedging0.18
4.0Bold0.0
3.6Lists2.1
0.02Emoji0.00
0.40Headings0.00
0.22Transitions0.02
Based on 23 + 10 text responses
Research
What we learned reading every model
FAQ
