Gemini 2.5 Pro Experimental vs GPT-5.1
Compare Gemini 2.5 Pro Experimental by Google AI against GPT-5.1 by OpenAI, context windows of 1.0M vs 400K, tested across 43 shared challenges.
Our Verdict
Gemini 2.5 Pro Experimental
GPT-5.1
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 5.0x 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
1.3× cheaper
Output
$2.00
5.0× cheaper
GPT-5.1
Input
$1.25
Output
$10.00
Gemini 2.5 Pro Experimental is cheaper on both — 1.3× input, 5.0× output
Writing DNA
Style Comparison
Similarity
57%
Gemini 2.5 Pro Experimental uses 6.3x more transitions
Gemini 2.5 Pro Experimental
GPT-5.1
54%Vocabulary62%
15wSentence Length19w
0.35Hedging0.29
5.6Bold3.5
3.9Lists7.2
0.00Emoji0.00
0.39Headings0.61
0.17Transitions0.03
Based on 18 + 14 text responses
Research
What we learned reading every model
FAQ
