Gemini 3.1 Pro Preview vs OpenAI: GPT-5.6 Luna Pro
Compare Gemini 3.1 Pro Preview by Google AI against OpenAI: GPT-5.6 Luna Pro by OpenAI, context windows of 1.0M vs 1.1M, tested across 53 shared challenges.
Our Verdict
Gemini 3.1 Pro Preview
OpenAI: GPT-5.6 Luna Pro
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
Gemini 3.1 Pro Preview
Input
$2.00
Output
$12.00
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
2.0× cheaper
Output
$6.00
2.0× cheaper
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 2.0× input, 2.0× output
Writing DNA
Style Comparison
Similarity
40%
OpenAI: GPT-5.6 Luna Pro uses 53.7x more emoji
Gemini 3.1 Pro Preview
OpenAI: GPT-5.6 Luna Pro
54%Vocabulary58%
18wSentence Length18w
0.29Hedging0.81
4.9Bold2.9
3.3Lists5.1
0.00Emoji0.54
0.72Headings1.10
0.14Transitions0.09
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
