GPT-4 vs OpenAI: GPT-5.6 Luna Pro
Compare GPT-4 and OpenAI: GPT-5.6 Luna Pro, both from OpenAI, context windows of 8K vs 1.1M, tested across 26 shared challenges.
Our Verdict
GPT-4
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.
OpenAI: GPT-5.6 Luna Pro is 10x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-4
Input
$30.00
Output
$60.00
OpenAI: GPT-5.6 Luna Pro
Input
$1.00
30× cheaper
Output
$6.00
10× cheaper
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 30× input, 10× output
Writing DNA
Style Comparison
Similarity
57%
OpenAI: GPT-5.6 Luna Pro uses 53.7x more emoji
GPT-4
OpenAI: GPT-5.6 Luna Pro
59%Vocabulary58%
18wSentence Length18w
1.10Hedging0.81
0.8Bold2.9
2.5Lists5.1
0.00Emoji0.54
0.00Headings1.10
0.45Transitions0.09
Based on 15 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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