xAI: Grok 4 Fast (free) vs Grok 4.20 Multi-Agent Beta
Compare xAI: Grok 4 Fast (free) and Grok 4.20 Multi-Agent Beta, both from xAI, context windows of 2.0M vs 2.0M, tested across 34 shared challenges.
Our Verdict
Grok 4.20 Multi-Agent Beta
xAI: Grok 4 Fast (free)Runner-up
No community votes yet. On paper, Grok 4.20 Multi-Agent Beta has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
xAI: Grok 4 Fast (free)
Input
$0.000
Output
$0.000
Grok 4.20 Multi-Agent Beta
Input
$2.00
Output
$6.00
Writing DNA
Style Comparison
Similarity
58%
xAI: Grok 4 Fast (free) uses 11.3x more transitions
xAI: Grok 4 Fast (free)
Grok 4.20 Multi-Agent Beta
65%Vocabulary59%
13wSentence Length16w
0.56Hedging0.41
1.4Bold2.7
2.5Lists2.4
0.00Emoji0.00
1.58Headings0.26
0.28Transitions0.02
Based on 14 + 23 text responses
Research
What we learned reading every model
FAQ
