Claude 3.7 Sonnet vs Horizon Alpha
Compare Claude 3.7 Sonnet by Anthropic against Horizon Alpha by OpenRouter, in 7 community votes, horizon alpha wins 67% of head-to-head duels, context windows of 200K vs 256K, tested across 34 shared challenges. Updated May 2026.
Which is better, Claude 3.7 Sonnet or Horizon Alpha?
Horizon Alpha is the better choice overall, winning 67% of 7 blind community votes on Rival. Claude 3.7 Sonnet costs $3/M input tokens vs $0/M for Horizon Alpha. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3.7 Sonnet and Horizon Alpha
Claude 3.7 Sonnet is made by anthropic while Horizon Alpha is from openrouter. Claude 3.7 Sonnet has a 200K token context window compared to Horizon Alpha's 256K. On pricing, Claude 3.7 Sonnet costs $3/M input tokens vs $0/M for Horizon Alpha. In community voting, In 7 community votes, Horizon Alpha wins 67% of head-to-head duels.
In 7 community votes, Horizon Alpha wins 67% of head-to-head duels. Horizon Alpha leads in Web Design. Based on blind community voting from the Rival open dataset of 7+ human preference judgments for this pair.
Per 1M tokens
Pick Horizon Alpha. In 7 blind votes, Horizon Alpha wins 67% of the time. That's not luck.
Horizon Alpha particularly excels in Web Design.
Style Comparison
Claude 3.7 Sonnet uses 121.0x more bold
