GPT-4.1 Nano vs OpenAI: GPT-5.6 Luna
Compare GPT-4.1 Nano and OpenAI: GPT-5.6 Luna, both from OpenAI, context windows of 1.0M vs 1.1M, tested across 53 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
GPT-4.1 NanoRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Luna has the edge — bigger model tier, newer.
GPT-4.1 Nano is 15x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.1 Nano
Input
$0.10
10× cheaper
Output
$0.40
15× cheaper
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
GPT-4.1 Nano is cheaper on both — 10× input, 15× output
Writing DNA
Style Comparison
Similarity
74%
GPT-4.1 Nano uses 2.3x more transitions
GPT-4.1 Nano
OpenAI: GPT-5.6 Luna
57%Vocabulary59%
25wSentence Length19w
0.72Hedging0.84
5.6Bold2.7
4.9Lists4.5
0.00Emoji0.00
0.71Headings1.20
0.22Transitions0.10
Based on 24 + 27 text responses
Research
What we learned reading every model
FAQ
