Gemini 2.5 Pro (I/O Edition) vs OpenAI: GPT-5.6 Terra
Compare Gemini 2.5 Pro (I/O Edition) by Google AI against OpenAI: GPT-5.6 Terra by OpenAI, tested across 40 shared challenges.
Our Verdict
Gemini 2.5 Pro (I/O Edition)
OpenAI: GPT-5.6 Terra
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
2.0× cheaper
Output
$10.00
1.5× cheaper
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Gemini 2.5 Pro (I/O Edition) is cheaper on both — 2.0× input, 1.5× output
Writing DNA
Style Comparison
Similarity
51%
OpenAI: GPT-5.6 Terra uses 4.7x more transitions
Gemini 2.5 Pro (I/O Edition)
OpenAI: GPT-5.6 Terra
58%Vocabulary57%
16wSentence Length18w
0.38Hedging0.85
5.8Bold2.8
5.0Lists4.6
0.00Emoji0.00
0.63Headings1.12
0.01Transitions0.06
Based on 16 + 27 text responses
Research
What we learned reading every model
FAQ
