OpenAI: GPT-5.6 Luna vs Inception: Mercury
Compare OpenAI: GPT-5.6 Luna by OpenAI against Inception: Mercury by Inception, context windows of 1.1M vs 32K, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
Inception: MercuryRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Luna has the edge — newer, bigger context window, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Luna
Input
$1.00
10× cheaper
Output
$6.00
1.7× cheaper
Inception: Mercury
Input
$10.00
Output
$10.00
OpenAI: GPT-5.6 Luna is cheaper on both — 10× input, 1.7× output
Writing DNA
Style Comparison
Similarity
53%
Inception: Mercury uses 4.3x more emoji
OpenAI: GPT-5.6 Luna
Inception: Mercury
59%Vocabulary55%
19wSentence Length40w
0.84Hedging0.39
2.7Bold4.9
4.5Lists3.8
0.00Emoji0.04
1.20Headings1.04
0.10Transitions0.03
Based on 27 + 17 text responses
Research
What we learned reading every model
FAQ
