Grok 4.20 Beta vs Horizon Beta
Compare Grok 4.20 Beta by xAI against Horizon Beta by OpenRouter, context windows of 2.0M vs 256K, tested across 40 shared challenges. Updated April 2026.
Which is better, Grok 4.20 Beta or Horizon Beta?
Grok 4.20 Beta and Horizon Beta are both competitive models. Grok 4.20 Beta costs $2/M input tokens vs $0/M for Horizon Beta. Context windows: 2000K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Grok 4.20 Beta and Horizon Beta
Grok 4.20 Beta is made by xai while Horizon Beta is from openrouter. Grok 4.20 Beta has a 2000K token context window compared to Horizon Beta's 256K. On pricing, Grok 4.20 Beta costs $2/M input tokens vs $0/M for Horizon Beta.
No community votes yet. On paper, Grok 4.20 Beta has the edge — bigger model tier, newer, bigger context window, major provider backing.
Style Comparison
Grok 4.20 Beta uses 417.7x more bold
vsAsk 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.
