Gemini 2.5 Pro Experimental vs GPT-5.5
Compare Gemini 2.5 Pro Experimental by Google AI against GPT-5.5 by OpenAI, context windows of 1.0M vs 1.1M, tested across 42 shared challenges.
Our Verdict
Gemini 2.5 Pro Experimental
GPT-5.5
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Gemini 2.5 Pro Experimental is 15x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Pro Experimental
Input
$1.00
5.0× cheaper
Output
$2.00
15× cheaper
GPT-5.5
Input
$5.00
Output
$30.00
Gemini 2.5 Pro Experimental is cheaper on both — 5.0× input, 15× output
Writing DNA
Style Comparison
Similarity
41%
Gemini 2.5 Pro Experimental uses 5.0x more transitions
Gemini 2.5 Pro Experimental
GPT-5.5
54%Vocabulary58%
15wSentence Length18w
0.35Hedging0.74
5.6Bold2.9
3.9Lists5.1
0.00Emoji0.00
0.39Headings1.68
0.17Transitions0.03
Based on 18 + 26 text responses
Research
What we learned reading every model
FAQ
