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  5. GPT-4.5vsHy3
Updated Jul 2026

GPT-4.5vsHy3

Hy3 is cheaper than GPT-4.5 at $0.132/M vs $75/M input tokens.

GPT-4.5 and Hy3 compared across 2 shared prompts
SpecGPT-4.5Hy3
Input price$75/M tokens$0.132/M tokens
Output price$150/M tokens$0.528/M tokens
Context window128K tokens262K tokens
ParametersNot disclosed295B
Weights—Open
Free API (OpenRouter)NoNo
ReleasedFeb 2025Jul 2026
Side by side

Same prompt, both answers

Opening lines from every prompt both answered. Formatting stripped, words untouched.

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-4.5153 words
Sweet Cinnamon Sugar Swirls Ingredients: 1 sheet puff pastry, thawed 1/4 cup granulated sugar 1 tablespoon cinnamon 2 tablespoons melted butter Pinch of salt 1 teaspoon vanilla extract Powdered sugar (optional for dusting) Prep Time: 10 minutes Cook Time: 15 minutes Total Time: 25 minutes Instructions: Preheat your…
Read the full answer
Hy3178 words
Dish Name: Ruby Hurricane Pasta Ingredients (exactly 7 common pantry staples): Spaghetti (or any dry pasta) Canned diced tomatoes Garlic (pre-minced or whole cloves) Extra-virgin olive oil Red pepper flakes Salt Grated Parmesan (shelf-stable style) (Water for boiling pasta is assumed free and not counted.)
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

GPT-4.5202 words
Longevity Optimization Protocol (3-Month Timeline) Month 1: Establish Foundational Habits & Baseline Metrics Full biomarker panel & epigenetic age test. Wearable setup: Oura/WHOOP, CGM, HR chest strap. Diet: 5-day keto (70/25/5) + 2 carb-refeed days; 16:8 IF + weekly 24-h fast.
Read the full answer
Hy3498 words
The 90-Day Biohacker Longevity & Performance Protocol Goal: Maximize healthspan, cognitive resilience, and physical capacity via quantified self, metabolic flexibility, and targeted compounds. Assumptions: Healthy adult, experienced with fasting/exercise, access to wearables & supplements. I.
Read the full answer
Our Verdict
GPT-4.5
GPT-4.5
Hy3
Hy3

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

Hy3 costs 284x less per token.

Too close to call
API pricing

Cost per 1M tokens

GPT-4.5
Input
$75.00
Output
$150.00
Hy3
Input
$0.13
568× cheaper
Output
$0.53
284× cheaper

Hy3 is cheaper on both: 568× input, 284× output.

Where to run it

6 hosts, cheapest first

GPT-4.5

No hosts listed on OpenRouter.

Hy36 hosts
HostInOutContextUptime
Tencentfp8$0.08 in·$0.33 out·262k·99.9% upDDeepInfrafp4$0.13 in·$0.53 out·262k·99.6% upGGMI Cloudbf16$0.14 in·$0.58 out·262k·98.6% upNNovita$0.14 in·$0.58 out·262k·99.7% upPPhala$0.15 in·$0.64 out·262k·99.9% upAAtlasCloudfp8$0.20 in·$0.80 out·262k·99.9% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GPT-4.5 is developed by OpenAI while Hy3 is developed by Tencent. GPT-4.5 has a 128K token context window vs Hy3's 262K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-4.5 and Hy3 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

GPT-4.5 costs $75/M input tokens and Hy3 costs $0.132/M input tokens. Hy3 is $74.87/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-4.5 and Hy3 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

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