OpenAI: GPT-5.6 Luna vs Grok 4.20 Multi-Agent Beta
Compare OpenAI: GPT-5.6 Luna by OpenAI against Grok 4.20 Multi-Agent Beta by xAI, context windows of 1.1M vs 2.0M, tested across 53 shared challenges.
Our Verdict
Grok 4.20 Multi-Agent Beta
OpenAI: GPT-5.6 LunaRunner-up
No community votes yet. On paper, Grok 4.20 Multi-Agent Beta has the edge — bigger model tier, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Luna
Input
$1.00
2.0× cheaper
Output
$6.00
Grok 4.20 Multi-Agent Beta
Input
$2.00
Output
$6.00
Writing DNA
Style Comparison
Similarity
63%
OpenAI: GPT-5.6 Luna uses 4.5x more headings
OpenAI: GPT-5.6 Luna
Grok 4.20 Multi-Agent Beta
59%Vocabulary59%
19wSentence Length16w
0.84Hedging0.41
2.7Bold2.7
4.5Lists2.4
0.00Emoji0.00
1.20Headings0.26
0.10Transitions0.02
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
