Gemini 1.5 Pro vs GPT-4.5
Compare Gemini 1.5 Pro by Google AI against GPT-4.5 by OpenAI, context windows of 1.0M vs 128K, tested across 12 shared challenges.
Our Verdict
GPT-4.5
Gemini 1.5 ProRunner-up
No community votes yet. On paper, GPT-4.5 has the edge — bigger model tier, newer.
Gemini 1.5 Pro is 14x 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
21× cheaper
Output
$10.50
14× cheaper
GPT-4.5
Input
$75.00
Output
$150.00
Gemini 1.5 Pro is cheaper on both — 21× input, 14× output
Writing DNA
Style Comparison
Similarity
37%
GPT-4.5 uses 16.1x more headings
Gemini 1.5 Pro
GPT-4.5
61%Vocabulary63%
15wSentence Length16w
0.80Hedging0.57
3.7Bold4.7
3.3Lists6.4
0.00Emoji0.00
0.08Headings1.30
0.09Transitions0.54
Based on 8 + 11 text responses
Research
What we learned reading every model
FAQ
