GPT-4 vs OpenAI: GPT-5.6 Luna
Compare GPT-4 and OpenAI: GPT-5.6 Luna, both from OpenAI, context windows of 8K vs 1.1M, tested across 26 shared challenges.
Our Verdict
GPT-4
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 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
Input
$1.00
30× cheaper
Output
$6.00
10× cheaper
OpenAI: GPT-5.6 Luna is cheaper on both — 30× input, 10× output
Writing DNA
Style Comparison
Similarity
55%
OpenAI: GPT-5.6 Luna uses 119.5x more headings
GPT-4
OpenAI: GPT-5.6 Luna
59%Vocabulary59%
18wSentence Length19w
1.10Hedging0.84
0.8Bold2.7
2.5Lists4.5
0.00Emoji0.00
0.00Headings1.20
0.45Transitions0.10
Based on 15 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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