DeepSeek V3.1 vs OpenAI: GPT-5.6 Luna
Compare DeepSeek V3.1 by DeepSeek against OpenAI: GPT-5.6 Luna by OpenAI, context windows of 164K vs 1.1M, tested across 53 shared challenges.
Our Verdict
DeepSeek V3.1
OpenAI: GPT-5.6 Luna
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
DeepSeek V3.1 is 7.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V3.1
Input
$0.20
5.0× cheaper
Output
$0.80
7.5× cheaper
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
DeepSeek V3.1 is cheaper on both — 5.0× input, 7.5× output
Writing DNA
Style Comparison
Similarity
51%
DeepSeek V3.1 uses 2.4x more emoji
DeepSeek V3.1
OpenAI: GPT-5.6 Luna
53%Vocabulary59%
14wSentence Length19w
0.42Hedging0.84
4.0Bold2.7
3.6Lists4.5
0.02Emoji0.00
0.40Headings1.20
0.22Transitions0.10
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
