xAI: Grok 4.5 vs Grok Code Fast 1
Compare xAI: Grok 4.5 and Grok Code Fast 1, both from xAI, context windows of 500K vs 256K, tested across 54 shared challenges.
Our Verdict
xAI: Grok 4.5
Grok Code Fast 1Runner-up
No community votes yet. On paper, xAI: Grok 4.5 has the edge — bigger model tier, newer, bigger context window.
Grok Code Fast 1 is 4.0x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
xAI: Grok 4.5
Input
$2.00
Output
$6.00
Grok Code Fast 1
Input
$0.20
10× cheaper
Output
$1.50
4.0× cheaper
Grok Code Fast 1 is cheaper on both — 10× input, 4.0× output
Writing DNA
Style Comparison
Similarity
62%
Grok Code Fast 1 uses 4.3x more hedging
xAI: Grok 4.5
Grok Code Fast 1
61%Vocabulary60%
16wSentence Length17w
0.23Hedging0.97
2.5Bold2.8
2.4Lists2.5
0.09Emoji0.06
0.48Headings0.89
0.06Transitions0.11
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
