GPT-5.1-Codex-Mini vs GPT-5.2 Chat
Compare GPT-5.1-Codex-Mini and GPT-5.2 Chat, both from OpenAI, context windows of 400K vs 128K, tested across 53 shared challenges.
Our Verdict
GPT-5.1-Codex-Mini
GPT-5.2 ChatRunner-up
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — bigger model tier, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex-Mini
Input
$1.50
1.2× cheaper
Output
$6.00
2.3× cheaper
GPT-5.2 Chat
Input
$1.75
Output
$14.00
GPT-5.1-Codex-Mini is cheaper on both — 1.2× input, 2.3× output
Writing DNA
Style Comparison
Similarity
53%
GPT-5.2 Chat uses 30.6x more emoji
GPT-5.1-Codex-Mini
GPT-5.2 Chat
65%Vocabulary66%
20wSentence Length16w
0.56Hedging0.41
3.3Bold9.6
3.4Lists4.4
0.00Emoji0.31
0.08Headings1.20
0.05Transitions0.27
Based on 13 + 16 text responses
Research
What we learned reading every model
FAQ
