Claude Haiku 4.5 vs Horizon Alpha
Compare Claude Haiku 4.5 by Anthropic against Horizon Alpha by OpenRouter, context windows of 200K vs 256K, tested across 34 shared challenges. Updated April 2026.
Which is better, Claude Haiku 4.5 or Horizon Alpha?
Claude Haiku 4.5 and Horizon Alpha are both competitive models. Claude Haiku 4.5 costs $1/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 Haiku 4.5 and Horizon Alpha
Claude Haiku 4.5 is made by anthropic while Horizon Alpha is from openrouter. Claude Haiku 4.5 has a 200K token context window compared to Horizon Alpha's 256K. On pricing, Claude Haiku 4.5 costs $1/M input tokens vs $0/M for Horizon Alpha.
No community votes yet. On paper, Claude Haiku 4.5 has the edge — newer, major provider backing.
Style Comparison
Claude Haiku 4.5 uses 513.9x 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.
