Claude Opus 4.1 vs Horizon Beta
Compare Claude Opus 4.1 by Anthropic against Horizon Beta by OpenRouter, in 15 community votes, horizon beta wins 69% of head-to-head duels, context windows of 200K vs 256K, tested across 40 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or Horizon Beta?
Horizon Beta is the better choice overall, winning 69% of 15 blind community votes on Rival. Claude Opus 4.1 costs $15/M input tokens vs $0/M for Horizon Beta. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and Horizon Beta
Claude Opus 4.1 is made by anthropic while Horizon Beta is from openrouter. Claude Opus 4.1 has a 200K token context window compared to Horizon Beta's 256K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0/M for Horizon Beta. In community voting, In 15 community votes, Horizon Beta wins 69% of head-to-head duels.
In 15 community votes, Horizon Beta wins 69% of head-to-head duels. Horizon Beta leads in Web Design, Image Generation, Reasoning. Based on blind community voting from the Rival open dataset of 15+ human preference judgments for this pair.
Pick Horizon Beta. In 15 blind votes, Horizon Beta wins 69% of the time. That's not luck.
Horizon Beta particularly excels in Image Generation, Reasoning, Web Design.
Style Comparison
Claude Opus 4.1 uses 509.5x more bold
vs
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
