DeepSeek V4 Pro vs OpenAI: GPT-5.6 Sol
Compare DeepSeek V4 Pro by DeepSeek against OpenAI: GPT-5.6 Sol by OpenAI, context windows of 1.0M vs 1.1M, tested across 54 shared challenges.
Our Verdict
DeepSeek V4 Pro
OpenAI: GPT-5.6 Sol
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
DeepSeek V4 Pro is 8.6x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
DeepSeek V4 Pro
Input
$1.74
2.9× cheaper
Output
$3.48
8.6× cheaper
OpenAI: GPT-5.6 Sol
Input
$5.00
Output
$30.00
DeepSeek V4 Pro is cheaper on both — 2.9× input, 8.6× output
Writing DNA
Style Comparison
Similarity
65%
OpenAI: GPT-5.6 Sol uses 2.1x more headings
DeepSeek V4 Pro
OpenAI: GPT-5.6 Sol
57%Vocabulary63%
18wSentence Length15w
0.52Hedging0.79
3.3Bold3.4
2.3Lists3.8
0.04Emoji0.03
0.45Headings0.95
0.15Transitions0.08
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
