Gemini 1.5 Pro vs OpenAI o3
Compare Gemini 1.5 Pro by Google AI against OpenAI o3 by OpenAI, tested across 19 shared challenges.
Our Verdict
OpenAI o3
Gemini 1.5 ProRunner-up
No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, newer.
Gemini 1.5 Pro is 3.8x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Gemini 1.5 Pro
Input
$3.50
2.9× cheaper
Output
$10.50
3.8× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Gemini 1.5 Pro is cheaper on both — 2.9× input, 3.8× output
Writing DNA
Style Comparison
Similarity
44%
Gemini 1.5 Pro uses 5.3x more bold
Gemini 1.5 Pro
OpenAI o3
61%Vocabulary68%
15wSentence Length14w
0.80Hedging0.26
3.7Bold0.7
3.3Lists3.0
0.00Emoji0.00
0.08Headings0.38
0.09Transitions0.12
Based on 8 + 16 text responses
Research
What we learned reading every model
FAQ
