Gemini 2.5 Pro (I/O Edition) vs GPT-5.1-Codex-Mini
Compare Gemini 2.5 Pro (I/O Edition) by Google AI against GPT-5.1-Codex-Mini by OpenAI, tested across 41 shared challenges.
Our Verdict
Gemini 2.5 Pro (I/O Edition)
GPT-5.1-Codex-Mini
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
Gemini 2.5 Pro (I/O Edition)
Input
$1.25
1.2× cheaper
Output
$10.00
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
1.7× cheaper
Gemini 2.5 Pro (I/O Edition) wins input (1.2× cheaper)·GPT-5.1-Codex-Mini wins output (1.7× cheaper)
Writing DNA
Style Comparison
Similarity
46%
Gemini 2.5 Pro (I/O Edition) uses 8.1x more headings
Gemini 2.5 Pro (I/O Edition)
GPT-5.1-Codex-Mini
58%Vocabulary65%
16wSentence Length20w
0.38Hedging0.56
5.8Bold3.3
5.0Lists3.4
0.00Emoji0.00
0.63Headings0.08
0.01Transitions0.05
Based on 16 + 13 text responses
Research
What we learned reading every model
FAQ
