GPT-5.1-Codex vs GPT-5.2 Pro
Compare GPT-5.1-Codex and GPT-5.2 Pro, both from OpenAI, context windows of 400K vs 400K, tested across 31 shared challenges.
Our Verdict
GPT-5.1-Codex
GPT-5.2 Pro
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5.1-Codex is 17x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex
Input
$1.25
17× cheaper
Output
$10.00
17× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
GPT-5.1-Codex is cheaper on both — 17× input, 17× output
Writing DNA
Style Comparison
Similarity
57%
GPT-5.1-Codex uses 24.0x more transitions
GPT-5.1-Codex
GPT-5.2 Pro
70%Vocabulary62%
17wSentence Length19w
0.39Hedging0.39
3.4Bold8.6
3.5Lists3.8
0.00Emoji0.00
0.50Headings1.17
0.38Transitions0.02
Based on 14 + 10 text responses
Research
What we learned reading every model
FAQ
Common questions
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