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  5. GPT-4vsHorizon Alpha
Updated Jul 2025

GPT-4vsHorizon Alpha

Horizon Alpha is cheaper than GPT-4 at $0/M vs $30/M input tokens.

GPT-4 and Horizon Alpha compared across 9 shared prompts
SpecGPT-4Horizon Alpha
Input price$30/M tokensFree
Output price$60/M tokensFree
Context window8K tokens256K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedMay 2023Jul 2025
Side by side

Same prompt, both answers

Opening lines from 2 of the 9 prompts both answered. Formatting stripped, words untouched.

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

GPT-4375 words
Title: 1-Month Plan for Better Health and Longevity Week 1 - Establishing a Healthy Diet 1.1: Start Eating Whole Foods: Begin by gradually replacing processed foods in your diet with whole foods. This may include fruits, vegetables, lean proteins, and whole grains.
Read the full answer
Horizon Alpha698 words
Here’s a simple, beginner-friendly 1‑month plan focused on diet, exercise, and sleep. It’s designed to be realistic, build consistency, and show quick wins. Overall approach Keep it simple: small daily actions beat perfection. Track 3 basics daily: steps, protein at meals, sleep duration.
Read the full answer

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

GPT-4172 words
Dish Name: Hearty Baked Beans Fiesta Ingredients: 2 cans of baked beans 1 large onion 3 cloves of garlic 1 bell pepper 1 can of sweet corn 2 tablespoons of olive oil Salt & pepper to taste Instructions: Preheat your oven to 350°F (175°C). Dice the onion, bell pepper, and mince the garlic.
Read the full answer
Horizon Alpha207 words
Golden Maple Soy Glazed Chickpeas Ingredients (7 pantry staples) 1 can (15 oz) chickpeas, drained and rinsed 2 tbsp soy sauce 1 tbsp maple syrup (or honey) 1 tbsp olive oil 1 tsp garlic powder 1/2 tsp smoked paprika (or regular paprika) Pinch of red pepper flakes (optional) + salt to taste Instructions Dry the…
Read the full answer
Our Verdict
GPT-4
GPT-4
Horizon Alpha
Horizon Alpha

Not enough votes to call it. On the specs, nothing separates them.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4
Input
$30.00
Output
$60.00
Horizon Alpha
Input
$0.000
Output
$0.000
Where to run it

2 hosts

GPT-42 hosts
HostInOutContextUptime
Azure AI Foundry$30.00 in·$60.00 out·8k·100% upOpenAI$30.00 in·$60.00 out·8k·100% up
Horizon Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
56%

GPT-4 uses 82.3x more bold

GPT-4
Horizon Alpha
59%Vocabulary65%
18wSentence Length14w
1.10Hedging0.22
0.8Bold0.0
2.5Lists3.5
0.00Emoji0.00
0.00Headings0.00
0.45Transitions0.12
Based on 15 + 14 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT-4 is developed by OpenAI while Horizon Alpha is developed by OpenRouter. GPT-4 has a 8K token context window vs Horizon Alpha's 256K. You can compare their actual outputs across 9 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-4 and Horizon Alpha each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 9 challenges so you can judge which fits your needs best.

GPT-4 costs $30/M input tokens and Horizon Alpha costs $0/M input tokens. Horizon Alpha is $30.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of GPT-4 and Horizon Alpha across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

GPT-4 logo
GPT-426 outputs, specs and price
Horizon Alpha logo
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