Claude 3 Sonnet vs OpenAI: GPT-5.6 Luna Pro
Compare Claude 3 Sonnet by Anthropic against OpenAI: GPT-5.6 Luna Pro by OpenAI, tested across 13 shared challenges.
Our Verdict
Claude 3 Sonnet
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
Claude 3 Sonnet
Input
$3.00
Output
$15.00
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
3.0× cheaper
Output
$6.00
2.5× cheaper
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 3.0× input, 2.5× output
Writing DNA
Style Comparison
Similarity
50%
OpenAI: GPT-5.6 Luna Pro uses 286.7x more bold
Claude 3 Sonnet
OpenAI: GPT-5.6 Luna Pro
48%Vocabulary58%
14wSentence Length18w
0.32Hedging0.81
0.0Bold2.9
3.6Lists5.1
0.00Emoji0.54
0.00Headings1.10
0.38Transitions0.09
Based on 4 + 27 text responses
Research
What we learned reading every model
FAQ
