Claude Opus 4 vs xAI: Grok 4.3
Compare Claude Opus 4 by Anthropic against xAI: Grok 4.3 by xAI, context windows of 200K vs 1.0M, tested across 53 shared challenges.
Our Verdict
Claude Opus 4
xAI: Grok 4.3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
xAI: Grok 4.3 is 30x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
xAI: Grok 4.3
Input
$1.25
12× cheaper
Output
$2.50
30× cheaper
xAI: Grok 4.3 is cheaper on both — 12× input, 30× output
Writing DNA
Style Comparison
Similarity
47%
Claude Opus 4 uses 11.2x more emoji
Claude Opus 4
xAI: Grok 4.3
64%Vocabulary62%
62wSentence Length16w
0.52Hedging0.46
4.4Bold2.3
9.1Lists2.5
0.11Emoji0.00
1.87Headings0.34
0.27Transitions0.14
Based on 16 + 27 text responses
Research
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FAQ
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