Gemini 3 Flash Preview vs OpenAI o3
Compare Gemini 3 Flash Preview by Google AI against OpenAI o3 by OpenAI, tested across 54 shared challenges.
Our Verdict
Gemini 3 Flash 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.
Gemini 3 Flash Preview is 13x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Gemini 3 Flash Preview
Input
$0.50
20× cheaper
Output
$3.00
13× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Gemini 3 Flash Preview is cheaper on both — 20× input, 13× output
Writing DNA
Style Comparison
Similarity
43%
Gemini 3 Flash Preview uses 10.2x more bold
Gemini 3 Flash Preview
OpenAI o3
55%Vocabulary68%
18wSentence Length14w
0.42Hedging0.26
7.1Bold0.7
4.5Lists3.0
0.00Emoji0.00
0.84Headings0.38
0.07Transitions0.12
Based on 24 + 16 text responses
Research
What we learned reading every model
FAQ
