Gemma 3 12B vs OpenAI o3
Compare Gemma 3 12B by Google AI against OpenAI o3 by OpenAI, tested across 54 shared challenges. Updated May 2026.
Which is better, Gemma 3 12B or OpenAI o3?
Gemma 3 12B and OpenAI o3 are both competitive models. Gemma 3 12B costs $0.03/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Gemma 3 12B and OpenAI o3
Gemma 3 12B is made by google while OpenAI o3 is from openai. On pricing, Gemma 3 12B costs $0.03/M input tokens vs $10/M for OpenAI o3.
API pricing
Per 1M tokens
Gemma 3 12B
Input
$0.03
333× cheaper
Output
$0.03
1333× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Gemma 3 12B is cheaper on both — 333× input, 1333× output
Our Verdict
OpenAI o3
Gemma 3 12BRunner-up
No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, newer.
Gemma 3 12B is 1333x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
27%
Gemma 3 12B uses 8.9x more bold
Gemma 3 12B
OpenAI o3
52%Vocabulary68%
17wSentence Length14w
0.66Hedging0.26
6.2Bold0.7
5.4Lists3.0
0.00Emoji0.00
0.06Headings0.38
0.23Transitions0.12
Based on 23 + 16 text responses
FAQ
