Claude Opus 4.1 vs xAI: Grok 4.5
Compare Claude Opus 4.1 by Anthropic against xAI: Grok 4.5 by xAI, context windows of 200K vs 500K, tested across 53 shared challenges.
Our Verdict
Claude Opus 4.1
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.
xAI: Grok 4.5 is 13x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4.1
Input
$15.00
Output
$75.00
xAI: Grok 4.5
Input
$2.00
7.5× cheaper
Output
$6.00
13× cheaper
xAI: Grok 4.5 is cheaper on both — 7.5× input, 13× output
Writing DNA
Style Comparison
Similarity
44%
Claude Opus 4.1 uses 5.4x more sentence length
Claude Opus 4.1
xAI: Grok 4.5
61%Vocabulary61%
87wSentence Length16w
0.54Hedging0.23
5.1Bold2.5
6.7Lists2.4
0.38Emoji0.09
1.68Headings0.48
0.13Transitions0.06
Based on 17 + 27 text responses
Research
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