Gemini 3.1 Pro Preview vs GPT-5 Pro
Compare Gemini 3.1 Pro Preview by Google AI against GPT-5 Pro by OpenAI, context windows of 1.0M vs 400K, tested across 41 shared challenges.
Our Verdict
Gemini 3.1 Pro Preview
GPT-5 ProRunner-up
No community votes yet. On paper, Gemini 3.1 Pro Preview has the edge — newer, bigger context window.
Gemini 3.1 Pro Preview is 10x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Gemini 3.1 Pro Preview
Input
$2.00
7.5× cheaper
Output
$12.00
10× cheaper
GPT-5 Pro
Input
$15.00
Output
$120.00
Gemini 3.1 Pro Preview is cheaper on both — 7.5× input, 10× output
Writing DNA
Style Comparison
Similarity
43%
Gemini 3.1 Pro Preview uses 487.7x more bold
Gemini 3.1 Pro Preview
GPT-5 Pro
54%Vocabulary65%
18wSentence Length15w
0.29Hedging0.32
4.9Bold0.0
3.3Lists2.9
0.00Emoji0.00
0.72Headings0.00
0.14Transitions0.01
Based on 23 + 11 text responses
Research
What we learned reading every model
FAQ
