GPT-5.1-Codex-Mini vs GPT-5.6 Luna Pro
Compare GPT-5.1-Codex-Mini and GPT-5.6 Luna Pro, both from OpenAI, context windows of 400K vs 1.1M, tested across 54 shared challenges.
Our Verdict
GPT-5.1-Codex-Mini
GPT-5.6 Luna Pro
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-5.1-Codex-Mini
Input
$1.50
Output
$6.00
GPT-5.6 Luna Pro
Input
$1.00
1.5× cheaper
Output
$6.00
Writing DNA
Style Comparison
Similarity
64%
GPT-5.6 Luna Pro uses 53.7x more emoji
GPT-5.1-Codex-Mini
GPT-5.6 Luna Pro
65%Vocabulary58%
20wSentence Length18w
0.56Hedging0.81
3.3Bold2.9
3.4Lists5.1
0.00Emoji0.54
0.08Headings1.10
0.05Transitions0.09
Based on 13 + 27 text responses
Research
What we learned reading every model
FAQ
