Claude Opus 4.6 vs Grok 3
Compare Claude Opus 4.6 by Anthropic against Grok 3 by xAI, context windows of 1.0M vs 128K, tested across 52 shared challenges. Updated May 2026.
Which is better, Claude Opus 4.6 or Grok 3?
Claude Opus 4.6 and Grok 3 are both competitive models. Context windows: 1000K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.6 and Grok 3
Claude Opus 4.6 is made by anthropic while Grok 3 is from xai. Claude Opus 4.6 has a 1000K token context window compared to Grok 3's 128K.
API pricing
Per 1M tokens
Claude Opus 4.6
Input
$5.00
Output
$25.00
Grok 3
Input
—
Output
—
Our Verdict
Claude Opus 4.6
Grok 3Runner-up
No community votes yet. On paper, Claude Opus 4.6 has the edge — newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
45%
Claude Opus 4.6 uses 5.3x more emoji
Claude Opus 4.6
Grok 3
53%Vocabulary49%
35wSentence Length18w
0.68Hedging0.94
5.2Bold2.5
2.9Lists3.0
0.21Emoji0.04
1.34Headings0.65
0.03Transitions0.08
Based on 23 + 17 text responses
FAQ
