GPT-5.2 Pro vs GPT-5.3-Codex
Compare GPT-5.2 Pro and GPT-5.3-Codex, both from OpenAI, context windows of 400K vs 400K, tested across 31 shared challenges.
Our Verdict
GPT-5.2 Pro
GPT-5.3-Codex
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5.3-Codex is 12x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.2 Pro
Input
$21.00
Output
$168.00
GPT-5.3-Codex
Input
$1.75
12× cheaper
Output
$14.00
12× cheaper
GPT-5.3-Codex is cheaper on both — 12× input, 12× output
Writing DNA
Style Comparison
Similarity
84%
GPT-5.3-Codex uses 15.8x more emoji
GPT-5.2 Pro
GPT-5.3-Codex
62%Vocabulary65%
19wSentence Length23w
0.39Hedging0.51
8.6Bold6.5
3.8Lists6.2
0.00Emoji0.16
1.17Headings1.90
0.02Transitions0.03
Based on 10 + 23 text responses
Research
What we learned reading every model
FAQ
