GPT-4.1 vs Horizon Alpha
Compare GPT-4.1 by OpenAI against Horizon Alpha by OpenRouter, context windows of 1.0M vs 256K, tested across 34 shared challenges. Updated May 2026.
Which is better, GPT-4.1 or Horizon Alpha?
GPT-4.1 and Horizon Alpha are both competitive models. GPT-4.1 costs $2/M input tokens vs $0/M for Horizon Alpha. Context windows: 1048K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.1 and Horizon Alpha
GPT-4.1 is made by openai while Horizon Alpha is from openrouter. GPT-4.1 has a 1048K token context window compared to Horizon Alpha's 256K. On pricing, GPT-4.1 costs $2/M input tokens vs $0/M for Horizon Alpha.
API pricing
Per 1M tokens
GPT-4.1
Input
$2.00
Output
$8.00
Horizon Alpha
Input
$0.000
Output
$0.000
Our Verdict
GPT-4.1
Horizon AlphaRunner-up
No community votes yet. On paper, GPT-4.1 has the edge — bigger model tier, bigger context window, major provider backing.
Too close to call
Writing DNA
Style Comparison
Similarity
44%
GPT-4.1 uses 902.6x more bold
GPT-4.1
Horizon Alpha
58%Vocabulary65%
19wSentence Length14w
0.38Hedging0.22
9.0Bold0.0
6.1Lists3.5
0.24Emoji0.00
1.01Headings0.00
0.07Transitions0.12
Based on 25 + 14 text responses
FAQ
