GPT-5.4 vs OpenAI o3
Compare GPT-5.4 and OpenAI o3, both from OpenAI, tested across 53 shared challenges.
Our Verdict
GPT-5.4
OpenAI o3
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
GPT-5.4
Input
$2.50
4.0× cheaper
Output
$15.00
2.7× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
GPT-5.4 is cheaper on both — 4.0× input, 2.7× output
Writing DNA
Style Comparison
Similarity
40%
OpenAI o3 uses 6.4x more transitions
GPT-5.4
OpenAI o3
54%Vocabulary68%
28wSentence Length14w
0.69Hedging0.26
4.1Bold0.7
8.1Lists3.0
0.00Emoji0.00
1.84Headings0.38
0.02Transitions0.12
Based on 22 + 16 text responses
Research
What we learned reading every model
FAQ
