Claude Opus 4 vs INTELLECT-3
Compare Claude Opus 4 by Anthropic against INTELLECT-3 by OpenRouter, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4 or INTELLECT-3?
Claude Opus 4 and INTELLECT-3 are both competitive models. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and INTELLECT-3
Claude Opus 4 is made by anthropic while INTELLECT-3 is from openrouter.
API pricing
Per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
INTELLECT-3
Input
—
Output
—
Our Verdict
Claude Opus 4
INTELLECT-3Runner-up
No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, bigger context window, major provider backing.
Too close to call
Writing DNA
Style Comparison
Similarity
68%
Claude Opus 4 uses 6.5x more emoji
Claude Opus 4
INTELLECT-3
64%Vocabulary55%
62wSentence Length21w
0.52Hedging0.60
4.4Bold4.9
9.1Lists4.7
0.11Emoji0.02
1.87Headings1.16
0.27Transitions0.25
Based on 16 + 24 text responses
FAQ
