Claude 3 Opus vs Grok 3
Compare Claude 3 Opus by Anthropic against Grok 3 by xAI, context windows of 200K vs 128K, tested across 11 shared challenges. Updated May 2026.
Which is better, Claude 3 Opus or Grok 3?
Claude 3 Opus and Grok 3 are both competitive models. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and Grok 3
Claude 3 Opus is made by anthropic while Grok 3 is from xai. Claude 3 Opus has a 200K token context window compared to Grok 3's 128K.
API pricing
Per 1M tokens
Claude 3 Opus
Input
$15.00
Output
$75.00
Grok 3
Input
—
Output
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Our Verdict
Claude 3 Opus
Grok 3
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
Writing DNA
Style Comparison
Similarity
51%
Grok 3 uses 246.4x more bold
Claude 3 Opus
Grok 3
54%Vocabulary49%
14wSentence Length18w
0.48Hedging0.94
0.0Bold2.5
3.0Lists3.0
0.00Emoji0.04
0.00Headings0.65
0.06Transitions0.08
Based on 3 + 17 text responses
FAQ
