OpenAI: GPT-5.6 Luna vs Grok 4.1 Fast
Compare OpenAI: GPT-5.6 Luna by OpenAI against Grok 4.1 Fast by xAI, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
Grok 4.1 Fast
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
Grok 4.1 Fast
Input
—
Output
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Writing DNA
Style Comparison
Similarity
43%
OpenAI: GPT-5.6 Luna uses 4.9x more hedging
OpenAI: GPT-5.6 Luna
Grok 4.1 Fast
59%Vocabulary67%
19wSentence Length15w
0.84Hedging0.17
2.7Bold4.7
4.5Lists3.7
0.00Emoji0.00
1.20Headings0.99
0.10Transitions0.14
Based on 27 + 24 text responses
Research
What we learned reading every model
FAQ
