Claude 3.7 Thinking Sonnet vs OpenAI: GPT-5.6 Luna
Compare Claude 3.7 Thinking Sonnet by Anthropic against OpenAI: GPT-5.6 Luna by OpenAI, context windows of 200K vs 1.1M, tested across 53 shared challenges.
Our Verdict
Claude 3.7 Thinking Sonnet
OpenAI: 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.
OpenAI: GPT-5.6 Luna is 5.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude 3.7 Thinking Sonnet
Input
$6.00
Output
$30.00
OpenAI: GPT-5.6 Luna
Input
$1.00
6.0× cheaper
Output
$6.00
5.0× cheaper
OpenAI: GPT-5.6 Luna is cheaper on both — 6.0× input, 5.0× output
Writing DNA
Style Comparison
Similarity
68%
Claude 3.7 Thinking Sonnet uses 2.6x more sentence length
Claude 3.7 Thinking Sonnet
OpenAI: GPT-5.6 Luna
61%Vocabulary59%
49wSentence Length19w
0.64Hedging0.84
2.2Bold2.7
4.5Lists4.5
0.00Emoji0.00
1.81Headings1.20
0.21Transitions0.10
Based on 21 + 27 text responses
Research
What we learned reading every model
FAQ
