GPT-5.4 Mini vs OpenAI: GPT-5.6 Luna
Compare GPT-5.4 Mini and OpenAI: GPT-5.6 Luna, both from OpenAI, context windows of 400K vs 1.1M, tested across 53 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
GPT-5.4 MiniRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Luna has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4 Mini
Input
$0.75
1.3× cheaper
Output
$4.50
1.3× cheaper
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
GPT-5.4 Mini is cheaper on both — 1.3× input, 1.3× output
Writing DNA
Style Comparison
Similarity
73%
OpenAI: GPT-5.6 Luna uses 2.6x more transitions
GPT-5.4 Mini
OpenAI: GPT-5.6 Luna
54%Vocabulary59%
20wSentence Length19w
0.72Hedging0.84
6.0Bold2.7
8.3Lists4.5
0.00Emoji0.00
2.11Headings1.20
0.04Transitions0.10
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
