ChatGPT-4o (March 2025) vs Gemini 3.6 Flash
Compare ChatGPT-4o (March 2025) by OpenAI against Gemini 3.6 Flash by Google AI, context windows of 128K vs 1.0M, tested across 32 shared challenges.
Our Verdict
ChatGPT-4o (March 2025)
Gemini 3.6 Flash
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
ChatGPT-4o (March 2025)
Input
$5.00
Output
$15.00
Gemini 3.6 Flash
Input
$1.50
3.3× cheaper
Output
$7.50
2.0× cheaper
Gemini 3.6 Flash is cheaper on both — 3.3× input, 2.0× output
Writing DNA
Style Comparison
Similarity
50%
ChatGPT-4o (March 2025) uses 22.4x more emoji
ChatGPT-4o (March 2025)
Gemini 3.6 Flash
55%Vocabulary60%
24wSentence Length19w
0.52Hedging0.13
3.3Bold5.4
6.0Lists2.7
0.94Emoji0.04
0.63Headings0.99
0.05Transitions0.07
Based on 15 + 27 text responses
Research
What we learned reading every model
FAQ
