xAI: Grok 4 Fast (free) vs Grok 4.1 Fast
Compare xAI: Grok 4 Fast (free) and Grok 4.1 Fast, both from xAI, in 3 community votes, grok 4.1 fast wins 67% of head-to-head duels, tested across 35 shared challenges.
Image Generation: xAI: Grok 4 Fast (free) and Grok 4.1 Fast are tied
Our Verdict
Grok 4.1 FastWinner
xAI: Grok 4 Fast (free)Runner-up
Pick Grok 4.1 Fast. In 3 blind votes, Grok 4.1 Fast wins 67% of the time. That's not luck.
Clear winner
API pricing
Cost per 1M tokens
xAI: Grok 4 Fast (free)
Input
$0.000
Output
$0.000
Grok 4.1 Fast
Input
—
Output
—
Writing DNA
Style Comparison
Similarity
65%
Grok 4.1 Fast uses 3.4x more bold
xAI: Grok 4 Fast (free)
Grok 4.1 Fast
65%Vocabulary67%
13wSentence Length15w
0.56Hedging0.17
1.4Bold4.7
2.5Lists3.7
0.00Emoji0.00
1.58Headings0.99
0.28Transitions0.14
Based on 14 + 24 text responses
Research
What we learned reading every model
FAQ
