OpenAI: GPT-5.6 Luna Pro vs Inception: Mercury
Compare OpenAI: GPT-5.6 Luna Pro 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 Pro
Inception: MercuryRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Luna Pro 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 Pro
Input
$1.00
10× cheaper
Output
$6.00
1.7× cheaper
Inception: Mercury
Input
$10.00
Output
$10.00
OpenAI: GPT-5.6 Luna Pro is cheaper on both — 10× input, 1.7× output
Writing DNA
Style Comparison
Similarity
48%
OpenAI: GPT-5.6 Luna Pro uses 12.6x more emoji
OpenAI: GPT-5.6 Luna Pro
Inception: Mercury
58%Vocabulary55%
18wSentence Length40w
0.81Hedging0.39
2.9Bold4.9
5.1Lists3.8
0.54Emoji0.04
1.10Headings1.04
0.09Transitions0.03
Based on 27 + 17 text responses
Research
What we learned reading every model
FAQ
