DeepSeek V4 Flash 0731 vs OpenAI: GPT-5.6 Luna
Compare DeepSeek V4 Flash 0731 by DeepSeek against OpenAI: GPT-5.6 Luna by OpenAI, context windows of 1.0M vs 1.1M, tested across 42 shared challenges.
Our Verdict
DeepSeek V4 Flash 0731
OpenAI: GPT-5.6 LunaRunner-up
No community votes yet. On paper, DeepSeek V4 Flash 0731 has the edge — bigger model tier.
DeepSeek V4 Flash 0731 is 21x 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
7.1× cheaper
Output
$0.28
21× cheaper
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
DeepSeek V4 Flash 0731 is cheaper on both — 7.1× input, 21× output
Writing DNA
Style Comparison
Similarity
43%
OpenAI: GPT-5.6 Luna uses 2.7x more transitions
DeepSeek V4 Flash 0731
OpenAI: GPT-5.6 Luna
52%Vocabulary59%
18wSentence Length19w
0.38Hedging0.84
5.7Bold2.7
3.4Lists4.5
0.00Emoji0.00
0.83Headings1.20
0.04Transitions0.10
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
