xAI: Grok 4.5 vs Mistral Small 4
Compare xAI: Grok 4.5 by xAI against Mistral Small 4 by Mistral AI, context windows of 500K vs 262K, tested across 53 shared challenges.
Our Verdict
xAI: Grok 4.5
Mistral Small 4Runner-up
No community votes yet. On paper, xAI: Grok 4.5 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Mistral Small 4 is 10x 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
Mistral Small 4
Input
$0.15
13× cheaper
Output
$0.60
10× cheaper
Mistral Small 4 is cheaper on both — 13× input, 10× output
Writing DNA
Style Comparison
Similarity
29%
Mistral Small 4 uses 3.7x more bold
xAI: Grok 4.5
Mistral Small 4
61%Vocabulary50%
16wSentence Length18w
0.23Hedging0.58
2.5Bold9.0
2.4Lists5.6
0.09Emoji0.19
0.48Headings1.10
0.06Transitions0.12
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
