Claude Sonnet 4 vs Horizon Alpha
Compare Claude Sonnet 4 by Anthropic against Horizon Alpha by OpenRouter, in 26 community votes, horizon alpha wins 56% of head-to-head duels, context windows of 200K vs 256K, tested across 34 shared challenges.
Web Design: Horizon Alpha wins 70% of votes
Image Generation: Horizon Alpha wins 63% of votes
Reasoning: Claude Sonnet 4 wins 100% of votes
Analysis: Horizon Alpha wins 100% of votes
Our Verdict
Horizon AlphaWinner
Claude Sonnet 4Runner-up
Horizon Alpha has the edge overall. In 26 blind votes, Horizon Alpha wins 56% of the time.
Pick Claude Sonnet 4 for Reasoning. Pick Horizon Alpha for Analysis, Web Design, Image Generation.
Slight edge
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
Horizon Alpha
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
37%
Claude Sonnet 4 uses 503.7x more bold
Claude Sonnet 4
Horizon Alpha
62%Vocabulary65%
111wSentence Length14w
0.40Hedging0.22
5.0Bold0.0
9.3Lists3.5
0.88Emoji0.00
2.16Headings0.00
0.33Transitions0.12
Based on 17 + 14 text responses
Research
What we learned reading every model
FAQ
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