Claude Sonnet 4 vs INTELLECT-3
Compare Claude Sonnet 4 by Anthropic against INTELLECT-3 by OpenRouter, tested across 54 shared challenges. Updated May 2026.
Which is better, Claude Sonnet 4 or INTELLECT-3?
Claude Sonnet 4 and INTELLECT-3 are both competitive models. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and INTELLECT-3
Claude Sonnet 4 is made by anthropic while INTELLECT-3 is from openrouter.
API pricing
Per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
INTELLECT-3
Input
—
Output
—
Our Verdict
Claude Sonnet 4
INTELLECT-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
58%
Claude Sonnet 4 uses 51.1x more emoji
Claude Sonnet 4
INTELLECT-3
62%Vocabulary55%
111wSentence Length21w
0.40Hedging0.60
5.0Bold4.9
9.3Lists4.7
0.88Emoji0.02
2.16Headings1.16
0.33Transitions0.25
Based on 17 + 24 text responses
FAQ
