GPT-5.5 vs Inception: Mercury 2
Compare GPT-5.5 by OpenAI against Inception: Mercury 2 by Inception, context windows of 1.1M vs 128K, tested across 53 shared challenges.
Our Verdict
GPT-5.5
Inception: Mercury 2Runner-up
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Inception: Mercury 2 is 40x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.5
Input
$5.00
Output
$30.00
Inception: Mercury 2
Input
$0.25
20× cheaper
Output
$0.75
40× cheaper
Inception: Mercury 2 is cheaper on both — 20× input, 40× output
Writing DNA
Style Comparison
Similarity
51%
Inception: Mercury 2 uses 8.2x more emoji
GPT-5.5
Inception: Mercury 2
58%Vocabulary53%
18wSentence Length22w
0.74Hedging0.40
2.9Bold6.6
5.1Lists2.6
0.00Emoji0.08
1.68Headings0.87
0.03Transitions0.14
Based on 26 + 23 text responses
Research
What we learned reading every model
FAQ
