Claude Sonnet 5 vs xAI: Grok 4.5
Compare Claude Sonnet 5 by Anthropic against xAI: Grok 4.5 by xAI, context windows of 1.0M vs 500K, tested across 54 shared challenges.
Our Verdict
Claude Sonnet 5
xAI: Grok 4.5
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 5
Input
$2.00
Output
$10.00
xAI: Grok 4.5
Input
$2.00
Output
$6.00
1.7× cheaper
Writing DNA
Style Comparison
Similarity
56%
Claude Sonnet 5 uses 8.8x more emoji
Claude Sonnet 5
xAI: Grok 4.5
59%Vocabulary61%
35wSentence Length16w
0.53Hedging0.23
3.5Bold2.5
3.5Lists2.4
0.79Emoji0.09
1.25Headings0.48
0.06Transitions0.06
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
