Horizon Beta vs OpenAI o4-mini
Compare Horizon Beta by OpenRouter against OpenAI o4-mini by OpenAI, tested across 41 shared challenges. Updated May 2026.
Which is better, Horizon Beta or OpenAI o4-mini?
Horizon Beta and OpenAI o4-mini are both competitive models. Horizon Beta costs $0/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between Horizon Beta and OpenAI o4-mini
Horizon Beta is made by openrouter while OpenAI o4-mini is from openai. On pricing, Horizon Beta costs $0/M input tokens vs $1.1/M for OpenAI o4-mini.
API pricing
Per 1M tokens
Horizon Beta
Input
$0.000
Output
$0.000
OpenAI o4-mini
Input
$1.10
Output
$4.40
Our Verdict
Horizon Beta
OpenAI o4-miniRunner-up
No community votes yet. On paper, Horizon Beta has the edge — bigger model tier, newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
67%
Horizon Beta uses 12.0x more transitions
Horizon Beta
OpenAI o4-mini
62%Vocabulary73%
15wSentence Length15w
0.24Hedging0.18
0.0Bold0.0
2.2Lists2.1
0.00Emoji0.00
0.00Headings0.00
0.18Transitions0.02
Based on 16 + 10 text responses
FAQ
