OpenAI: GPT-5.6 Luna Pro vs MoonshotAI: Kimi K3
Compare OpenAI: GPT-5.6 Luna Pro by OpenAI against MoonshotAI: Kimi K3 by Moonshot AI, context windows of 1.1M vs 1.0M, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna Pro
MoonshotAI: Kimi K3
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 Pro
Input
$1.00
3.0× cheaper
Output
$6.00
2.5× cheaper
MoonshotAI: Kimi K3
Input
$3.00
Output
$15.00
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 3.0× input, 2.5× output
Writing DNA
Style Comparison
Similarity
56%
MoonshotAI: Kimi K3 uses 1.9x more transitions
OpenAI: GPT-5.6 Luna Pro
MoonshotAI: Kimi K3
58%Vocabulary58%
18wSentence Length21w
0.81Hedging0.46
2.9Bold3.6
5.1Lists3.4
0.54Emoji0.78
1.10Headings0.89
0.09Transitions0.17
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
