GPT-5.1 vs GPT-5.2 Pro
Compare GPT-5.1 and GPT-5.2 Pro, both from OpenAI, context windows of 400K vs 400K, tested across 31 shared challenges.
Our Verdict
GPT-5.1
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 is 17x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
17× cheaper
Output
$10.00
17× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
GPT-5.1 is cheaper on both — 17× input, 17× output
Writing DNA
Style Comparison
Similarity
59%
GPT-5.2 Pro uses 2.5x more bold
GPT-5.1
GPT-5.2 Pro
62%Vocabulary62%
19wSentence Length19w
0.29Hedging0.39
3.5Bold8.6
7.2Lists3.8
0.00Emoji0.00
0.61Headings1.17
0.03Transitions0.02
Based on 14 + 10 text responses
Research
What we learned reading every model
FAQ
Common questions
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