Claude Opus 4 vs OpenRouter Fusion · Quality (Jun 2026)
Compare Claude Opus 4 by Anthropic against OpenRouter Fusion · Quality (Jun 2026) by OpenRouter, context windows of 200K vs 256K, tested across 53 shared challenges. Updated June 2026.
Which is better, Claude Opus 4 or OpenRouter Fusion · Quality (Jun 2026)?
Claude Opus 4 and OpenRouter Fusion · Quality (Jun 2026) are both competitive models. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and OpenRouter Fusion · Quality (Jun 2026)
Claude Opus 4 is made by anthropic while OpenRouter Fusion · Quality (Jun 2026) is from openrouter. Claude Opus 4 has a 200K token context window compared to OpenRouter Fusion · Quality (Jun 2026)'s 256K.
API pricing
Per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
OpenRouter Fusion · Quality (Jun 2026)
Input
—
Output
—
Our Verdict
Claude Opus 4
OpenRouter Fusion · Quality (Jun 2026)
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
27%
OpenRouter Fusion · Quality (Jun 2026) uses 6.1x more emoji
Claude Opus 4
OpenRouter Fusion · Quality (Jun 2026)
64%Vocabulary55%
62wSentence Length21w
0.52Hedging0.47
4.4Bold4.0
9.1Lists2.0
0.11Emoji0.68
1.87Headings0.73
0.27Transitions0.09
Based on 16 + 27 text responses
FAQ
