Gemini 3 Pro Preview vs OpenAI o3
Compare Gemini 3 Pro Preview by Google AI against OpenAI o3 by OpenAI, tested across 51 shared challenges. Updated May 2026.
Which is better, Gemini 3 Pro Preview or OpenAI o3?
Gemini 3 Pro Preview and OpenAI o3 are both competitive models. Compare their real outputs side by side below.
Key Differences Between Gemini 3 Pro Preview and OpenAI o3
Gemini 3 Pro Preview is made by google while OpenAI o3 is from openai.
API pricing
Per 1M tokens
Gemini 3 Pro Preview
Input
—
Output
—
OpenAI o3
Input
$10.00
Output
$40.00
Our Verdict
Gemini 3 Pro Preview
OpenAI o3
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
Writing DNA
Style Comparison
Similarity
39%
Gemini 3 Pro Preview uses 11.0x more bold
Gemini 3 Pro Preview
OpenAI o3
58%Vocabulary68%
17wSentence Length14w
0.37Hedging0.26
7.7Bold0.7
4.8Lists3.0
0.00Emoji0.00
0.90Headings0.38
0.25Transitions0.12
Based on 23 + 16 text responses
FAQ
