Claude Opus 4 vs Grok 3 Thinking
Compare Claude Opus 4 by Anthropic against Grok 3 Thinking by xAI, context windows of 200K vs 128K, tested across 13 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or Grok 3 Thinking?
Claude Opus 4 and Grok 3 Thinking are both competitive models. Context windows: 200K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and Grok 3 Thinking
Claude Opus 4 is made by anthropic while Grok 3 Thinking is from xai. Claude Opus 4 has a 200K token context window compared to Grok 3 Thinking's 128K.
API pricing
Per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
Grok 3 Thinking
Input
—
Output
—
Our Verdict
Claude Opus 4
Grok 3 ThinkingRunner-up
No community votes yet. On paper, Claude Opus 4 has the edge — newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
41%
Claude Opus 4 uses 11.2x more emoji
Claude Opus 4
Grok 3 Thinking
64%Vocabulary46%
62wSentence Length19w
0.52Hedging1.11
4.4Bold3.3
9.1Lists2.6
0.11Emoji0.00
1.87Headings0.64
0.27Transitions0.25
Based on 16 + 6 text responses
FAQ
