GPT-5.4 Pro vs OpenAI o3
Compare GPT-5.4 Pro and OpenAI o3, both from OpenAI, tested across 18 shared challenges.
Our Verdict
GPT-5.4 Pro
OpenAI o3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
OpenAI o3 is 4.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4 Pro
Input
$30.00
Output
$180.00
OpenAI o3
Input
$10.00
3.0× cheaper
Output
$40.00
4.5× cheaper
OpenAI o3 is cheaper on both — 3.0× input, 4.5× output
Writing DNA
Style Comparison
Similarity
40%
OpenAI o3 uses 11.7x more transitions
GPT-5.4 Pro
OpenAI o3
50%Vocabulary68%
35wSentence Length14w
0.70Hedging0.26
7.5Bold0.7
8.3Lists3.0
0.00Emoji0.00
2.52Headings0.38
0.01Transitions0.12
Based on 12 + 16 text responses
Research
What we learned reading every model
FAQ
