xAI: Grok 4.3 vs Grok Code Fast 1
Compare xAI: Grok 4.3 and Grok Code Fast 1, both from xAI, context windows of 1.0M vs 256K, tested across 54 shared challenges.
Our Verdict
xAI: Grok 4.3
Grok Code Fast 1Runner-up
No community votes yet. On paper, xAI: Grok 4.3 has the edge — bigger model tier, newer, bigger context window.
Slight edge
API pricing
Cost per 1M tokens
xAI: Grok 4.3
Input
$1.25
Output
$2.50
Grok Code Fast 1
Input
$0.20
6.3× cheaper
Output
$1.50
1.7× cheaper
Grok Code Fast 1 is cheaper on both — 6.3× input, 1.7× output
Writing DNA
Style Comparison
Similarity
71%
Grok Code Fast 1 uses 6.0x more emoji
xAI: Grok 4.3
Grok Code Fast 1
62%Vocabulary60%
16wSentence Length17w
0.46Hedging0.97
2.3Bold2.8
2.5Lists2.5
0.00Emoji0.06
0.34Headings0.89
0.14Transitions0.11
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
