Claude Sonnet 3.6 (2022-10-22) vs GPT-5.6 Luna
Compare Claude Sonnet 3.6 (2022-10-22) by Anthropic against GPT-5.6 Luna by OpenAI, context windows of 200K vs 1.1M, tested across 53 shared challenges.
Our Verdict
Claude Sonnet 3.6 (2022-10-22)
GPT-5.6 Luna
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
Claude Sonnet 3.6 (2022-10-22)
Input
$3.00
Output
$15.00
GPT-5.6 Luna
Input
$1.00
3.0× cheaper
Output
$6.00
2.5× cheaper
GPT-5.6 Luna is cheaper on both — 3.0× input, 2.5× output
Writing DNA
Style Comparison
Similarity
66%
GPT-5.6 Luna uses 21.3x more headings
Claude Sonnet 3.6 (2022-10-22)
GPT-5.6 Luna
66%Vocabulary59%
74wSentence Length19w
0.72Hedging0.84
0.3Bold2.7
8.9Lists4.5
0.00Emoji0.00
0.06Headings1.20
0.09Transitions0.10
Based on 21 + 27 text responses
Research
What we learned reading every model
FAQ
