Claude Sonnet 4.5 vs OpenRouter Fusion · Budget (Jun 2026)
Compare Claude Sonnet 4.5 by Anthropic against OpenRouter Fusion · Budget (Jun 2026) by OpenRouter, context windows of 200K vs 256K, tested across 34 shared challenges.
Our Verdict
OpenRouter Fusion · Budget (Jun 2026)
Claude Sonnet 4.5Runner-up
No community votes yet. On paper, OpenRouter Fusion · Budget (Jun 2026) has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
OpenRouter Fusion · Budget (Jun 2026)
Input
—
Output
—
Writing DNA
Style Comparison
Similarity
60%
Claude Sonnet 4.5 uses 45.2x more emoji
Claude Sonnet 4.5
OpenRouter Fusion · Budget (Jun 2026)
64%Vocabulary58%
94wSentence Length22w
0.48Hedging0.13
4.9Bold3.8
8.0Lists1.7
0.45Emoji0.01
1.91Headings0.93
0.07Transitions0.17
Based on 20 + 27 text responses
Research
What we learned reading every model
FAQ
