ChatGPT-4o (March 2025) vs Gemini 3.1 Pro Preview
Compare ChatGPT-4o (March 2025) by OpenAI against Gemini 3.1 Pro Preview by Google AI, context windows of 128K vs 1.0M, tested across 32 shared challenges.
Our Verdict
Gemini 3.1 Pro Preview
ChatGPT-4o (March 2025)Runner-up
No community votes yet. On paper, Gemini 3.1 Pro Preview has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
ChatGPT-4o (March 2025)
Input
$5.00
Output
$15.00
Gemini 3.1 Pro Preview
Input
$2.00
2.5× cheaper
Output
$12.00
1.3× cheaper
Gemini 3.1 Pro Preview is cheaper on both — 2.5× input, 1.3× output
Writing DNA
Style Comparison
Similarity
31%
ChatGPT-4o (March 2025) uses 94.5x more emoji
ChatGPT-4o (March 2025)
Gemini 3.1 Pro Preview
55%Vocabulary54%
24wSentence Length18w
0.52Hedging0.29
3.3Bold4.9
6.0Lists3.3
0.94Emoji0.00
0.63Headings0.72
0.05Transitions0.14
Based on 15 + 23 text responses
Research
What we learned reading every model
FAQ
