Gemini 3 Flash Preview vs GPT-4.5
Compare Gemini 3 Flash Preview by Google AI against GPT-4.5 by OpenAI, context windows of 1.0M vs 128K, tested across 25 shared challenges.
Our Verdict
Gemini 3 Flash Preview
GPT-4.5
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 50x 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
150× cheaper
Output
$3.00
50× cheaper
GPT-4.5
Input
$75.00
Output
$150.00
Gemini 3 Flash Preview is cheaper on both — 150× input, 50× output
Writing DNA
Style Comparison
Similarity
32%
GPT-4.5 uses 7.2x more transitions
Gemini 3 Flash Preview
GPT-4.5
55%Vocabulary63%
18wSentence Length16w
0.42Hedging0.57
7.1Bold4.7
4.5Lists6.4
0.00Emoji0.00
0.84Headings1.30
0.07Transitions0.54
Based on 24 + 11 text responses
Research
What we learned reading every model
FAQ
