GPT-5.2 Pro vs OpenAI o3
Compare GPT-5.2 Pro and OpenAI o3, both from OpenAI, in 3 community votes, openai o3 wins 67% of head-to-head duels, tested across 31 shared challenges.
Our Verdict
OpenAI o3Winner
GPT-5.2 ProRunner-up
Pick OpenAI o3. In 3 blind votes, OpenAI o3 wins 67% of the time. That's not luck.
OpenAI o3 is 4.2x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
GPT-5.2 Pro
Input
$21.00
Output
$168.00
OpenAI o3
Input
$10.00
2.1× cheaper
Output
$40.00
4.2× cheaper
OpenAI o3 is cheaper on both — 2.1× input, 4.2× output
Writing DNA
Style Comparison
Similarity
58%
GPT-5.2 Pro uses 12.4x more bold
GPT-5.2 Pro
OpenAI o3
62%Vocabulary68%
19wSentence Length14w
0.39Hedging0.26
8.6Bold0.7
3.8Lists3.0
0.00Emoji0.00
1.17Headings0.38
0.02Transitions0.12
Based on 10 + 16 text responses
Research
What we learned reading every model
FAQ
