GPT-4o (Omni) vs OpenAI: GPT-5.6 Luna Pro
Compare GPT-4o (Omni) and OpenAI: GPT-5.6 Luna Pro, both from OpenAI, context windows of 128K vs 1.1M, tested across 53 shared challenges.
Our Verdict
GPT-4o (Omni)
OpenAI: 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-4o (Omni)
Input
$2.50
Output
$10.00
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
2.5× cheaper
Output
$6.00
1.7× cheaper
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 2.5× input, 1.7× output
Writing DNA
Style Comparison
Similarity
70%
OpenAI: GPT-5.6 Luna Pro uses 21.4x more emoji
GPT-4o (Omni)
OpenAI: GPT-5.6 Luna Pro
54%Vocabulary58%
18wSentence Length18w
0.72Hedging0.81
7.3Bold2.9
5.6Lists5.1
0.03Emoji0.54
1.40Headings1.10
0.26Transitions0.09
Based on 24 + 27 text responses
Research
What we learned reading every model
FAQ
