GPT-5.6 Luna vs Sonar Pro Search
Compare GPT-5.6 Luna by OpenAI against Sonar Pro Search by Perplexity, context windows of 1.1M vs 200K, tested across 52 shared challenges.
Our Verdict
GPT-5.6 Luna
Sonar Pro Search
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-5.6 Luna
Input
$1.00
3.0× cheaper
Output
$6.00
2.5× cheaper
Sonar Pro Search
Input
$3.00
Output
$15.00
GPT-5.6 Luna is cheaper on both — 3.0× input, 2.5× output
Writing DNA
Style Comparison
Similarity
62%
GPT-5.6 Luna uses 2.8x more hedging
GPT-5.6 Luna
Sonar Pro Search
59%Vocabulary60%
19wSentence Length22w
0.84Hedging0.30
2.7Bold2.7
4.5Lists2.6
0.00Emoji0.00
1.20Headings2.08
0.10Transitions0.07
Based on 27 + 25 text responses
Research
What we learned reading every model
FAQ
