GPT-5 Pro vs OpenAI: GPT-5.6 Luna Pro
Compare GPT-5 Pro and OpenAI: GPT-5.6 Luna Pro, both from OpenAI, context windows of 400K vs 1.1M, tested across 41 shared challenges.
Our Verdict
GPT-5 Pro
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.
OpenAI: GPT-5.6 Luna Pro is 20x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5 Pro
Input
$15.00
Output
$120.00
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
15× cheaper
Output
$6.00
20× cheaper
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 15× input, 20× output
Writing DNA
Style Comparison
Similarity
57%
OpenAI: GPT-5.6 Luna Pro uses 286.7x more bold
GPT-5 Pro
OpenAI: GPT-5.6 Luna Pro
65%Vocabulary58%
15wSentence Length18w
0.32Hedging0.81
0.0Bold2.9
2.9Lists5.1
0.00Emoji0.54
0.00Headings1.10
0.01Transitions0.09
Based on 11 + 27 text responses
Research
What we learned reading every model
FAQ
