OpenAI: GPT-5.6 Luna vs Llama 3.1 405B
Compare OpenAI: GPT-5.6 Luna by OpenAI against Llama 3.1 405B by Meta AI, context windows of 1.1M vs 128K, tested across 12 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
Llama 3.1 405B
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
OpenAI: GPT-5.6 Luna
Input
$1.00
2.7× cheaper
Output
$6.00
Llama 3.1 405B
Input
$2.70
Output
$3.10
1.9× cheaper
OpenAI: GPT-5.6 Luna wins input (2.7× cheaper)·Llama 3.1 405B wins output (1.9× cheaper)
Writing DNA
Style Comparison
Similarity
46%
OpenAI: GPT-5.6 Luna uses 275.0x more bold
OpenAI: GPT-5.6 Luna
Llama 3.1 405B
59%Vocabulary56%
19wSentence Length15w
0.84Hedging0.41
2.7Bold0.0
4.5Lists1.9
0.00Emoji0.03
1.20Headings0.00
0.10Transitions0.16
Based on 27 + 5 text responses
Research
What we learned reading every model
FAQ
