OpenAI: GPT-5.6 Luna Pro vs Sonoma Sky Alpha
Compare OpenAI: GPT-5.6 Luna Pro by OpenAI against Sonoma Sky Alpha by OpenRouter, context windows of 1.1M vs 2.0M, tested across 34 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna Pro
Sonoma Sky Alpha
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
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
Output
$6.00
Sonoma Sky Alpha
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
61%
OpenAI: GPT-5.6 Luna Pro uses 4.2x more emoji
OpenAI: GPT-5.6 Luna Pro
Sonoma Sky Alpha
58%Vocabulary62%
18wSentence Length16w
0.81Hedging0.41
2.9Bold1.6
5.1Lists2.8
0.54Emoji0.13
1.10Headings1.42
0.09Transitions0.06
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
