Gemini 3 Flash Preview vs OpenAI o4-mini
Compare Gemini 3 Flash Preview by Google AI against OpenAI o4-mini by OpenAI, tested across 54 shared challenges. Updated June 2026.
Which is better, Gemini 3 Flash Preview or OpenAI o4-mini?
Gemini 3 Flash Preview and OpenAI o4-mini are both competitive models. Gemini 3 Flash Preview costs $0.5/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between Gemini 3 Flash Preview and OpenAI o4-mini
Gemini 3 Flash Preview is made by google while OpenAI o4-mini is from openai. On pricing, Gemini 3 Flash Preview costs $0.5/M input tokens vs $1.1/M for OpenAI o4-mini.
Our Verdict
Gemini 3 Flash Preview
OpenAI o4-miniRunner-up
No community votes yet. On paper, Gemini 3 Flash Preview has the edge — bigger model tier, newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
Gemini 3 Flash Preview
Input
$0.50
2.2× cheaper
Output
$3.00
1.5× cheaper
OpenAI o4-mini
Input
$1.10
Output
$4.40
Gemini 3 Flash Preview is cheaper on both — 2.2× input, 1.5× output
Writing DNA
Style Comparison
Similarity
50%
Gemini 3 Flash Preview uses 710.1x more bold
Gemini 3 Flash Preview
OpenAI o4-mini
55%Vocabulary73%
18wSentence Length15w
0.42Hedging0.18
7.1Bold0.0
4.5Lists2.1
0.00Emoji0.00
0.84Headings0.00
0.07Transitions0.02
Based on 24 + 10 text responses
Research
What we learned reading every model
FAQ
