xAI: Grok 4 vs Llama 3.1 405B
Compare xAI: Grok 4 by xAI against Llama 3.1 405B by Meta AI, context windows of 256K vs 128K, tested across 12 shared challenges.
Our Verdict
xAI: Grok 4
Llama 3.1 405B
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Llama 3.1 405B is 4.8x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
xAI: Grok 4
Input
$3.00
Output
$15.00
Llama 3.1 405B
Input
$2.70
1.1× cheaper
Output
$3.10
4.8× cheaper
Llama 3.1 405B is cheaper on both — 1.1× input, 4.8× output
Writing DNA
Style Comparison
Similarity
54%
xAI: Grok 4 uses 267.9x more bold
xAI: Grok 4
Llama 3.1 405B
53%Vocabulary56%
18wSentence Length15w
0.67Hedging0.41
2.7Bold0.0
2.7Lists1.9
0.07Emoji0.03
0.86Headings0.00
0.04Transitions0.16
Based on 21 + 5 text responses
Research
What we learned reading every model
FAQ
