OpenAI: GPT-5.6 Sol vs MoonshotAI: Kimi K2 0905
Compare OpenAI: GPT-5.6 Sol by OpenAI against MoonshotAI: Kimi K2 0905 by Moonshot AI, context windows of 1.1M vs 262K, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Sol
MoonshotAI: Kimi K2 0905Runner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Sol has the edge — newer, bigger context window, major provider backing.
MoonshotAI: Kimi K2 0905 is 12x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Sol
Input
$5.00
Output
$30.00
MoonshotAI: Kimi K2 0905
Input
$0.60
8.3× cheaper
Output
$2.50
12× cheaper
MoonshotAI: Kimi K2 0905 is cheaper on both — 8.3× input, 12× output
Writing DNA
Style Comparison
Similarity
47%
OpenAI: GPT-5.6 Sol uses 4.6x more hedging
OpenAI: GPT-5.6 Sol
MoonshotAI: Kimi K2 0905
63%Vocabulary62%
15wSentence Length19w
0.79Hedging0.17
3.4Bold3.3
3.8Lists3.4
0.03Emoji0.15
0.95Headings0.83
0.08Transitions0.06
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
