GPT-5.1-Codex-Mini vs OpenAI: GPT-5.6 Luna
Compare GPT-5.1-Codex-Mini and OpenAI: GPT-5.6 Luna, both from OpenAI, context windows of 400K vs 1.1M, tested across 54 shared challenges.
Our Verdict
GPT-5.1-Codex-Mini
OpenAI: GPT-5.6 Luna
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
OpenAI: GPT-5.6 Luna
Input
$1.00
1.5× cheaper
Output
$6.00
Writing DNA
Style Comparison
Similarity
66%
OpenAI: GPT-5.6 Luna uses 15.5x more headings
GPT-5.1-Codex-Mini
OpenAI: GPT-5.6 Luna
65%Vocabulary59%
20wSentence Length19w
0.56Hedging0.84
3.3Bold2.7
3.4Lists4.5
0.00Emoji0.00
0.08Headings1.20
0.05Transitions0.10
Based on 13 + 27 text responses
Research
What we learned reading every model
FAQ
