GPT-5 vs GPT-5.1-Codex-Mini
Compare GPT-5 and GPT-5.1-Codex-Mini, both from OpenAI, context windows of 400K vs 400K, tested across 52 shared challenges.
Our Verdict
GPT-5
GPT-5.1-Codex-Mini
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
GPT-5
Input
$1.25
1.2× cheaper
Output
$10.00
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
1.7× cheaper
GPT-5 wins input (1.2× cheaper)·GPT-5.1-Codex-Mini wins output (1.7× cheaper)
Writing DNA
Style Comparison
Similarity
67%
GPT-5.1-Codex-Mini uses 17.7x more bold
GPT-5
GPT-5.1-Codex-Mini
65%Vocabulary65%
13wSentence Length20w
0.20Hedging0.56
0.2Bold3.3
4.6Lists3.4
0.00Emoji0.00
0.16Headings0.08
0.03Transitions0.05
Based on 16 + 13 text responses
Research
What we learned reading every model
FAQ
