xAI: Grok 4 vs xAI: Grok 4.5
Compare xAI: Grok 4 and xAI: Grok 4.5, both from xAI, context windows of 256K vs 500K, tested across 53 shared challenges.
Our Verdict
xAI: Grok 4.5
xAI: Grok 4Runner-up
No community votes yet. On paper, xAI: Grok 4.5 has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
xAI: Grok 4
Input
$3.00
Output
$15.00
xAI: Grok 4.5
Input
$2.00
1.5× cheaper
Output
$6.00
2.5× cheaper
xAI: Grok 4.5 is cheaper on both — 1.5× input, 2.5× output
Writing DNA
Style Comparison
Similarity
71%
xAI: Grok 4 uses 3.0x more hedging
xAI: Grok 4
xAI: Grok 4.5
53%Vocabulary61%
18wSentence Length16w
0.67Hedging0.23
2.7Bold2.5
2.7Lists2.4
0.07Emoji0.09
0.86Headings0.48
0.04Transitions0.06
Based on 21 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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