What is the difference between GLM 5.3 and GPT-4.5?

GLM 5.3 is developed by Zhipu AI while GPT-4.5 is developed by OpenAI. GLM 5.3 has a 1.3M token context window vs GPT-4.5's 128K. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 or GPT-4.5?

It depends on your use case. GLM 5.3 and GPT-4.5 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.

How much does GLM 5.3 cost compared to GPT-4.5?

GLM 5.3 costs $0.6538/M input tokens and GPT-4.5 costs $75/M input tokens. GLM 5.3 is $74.35/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GLM 5.3 and GPT-4.5 on Rival?

This page shows a side-by-side comparison of GLM 5.3 and GPT-4.5 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.

Updated Aug 2026

GLM 5.3vsGPT-4.5

GLM 5.3 is cheaper than GPT-4.5 at $0.6538/M vs $75/M input tokens.

GLM 5.3 and GPT-4.5 compared across 2 shared prompts
Spec	GLM 5.3	GPT-4.5
Input price	$0.6538/M tokens	$75/M tokens
Output price	$2.0548/M tokens	$150/M tokens
Context window	1.3M tokens	128K tokens
Weights	Open	—
Free API (OpenRouter)	No	No
Released	Aug 2026	Feb 2025

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…

GLM 5.3210 words

Golden Pantry Fried Rice Total Time: 20 minutes (5 min prep, 15 min cook) Ingredients (7 pantry staples) Cooked white rice (day-old is best) Eggs Soy sauce Garlic (minced or garlic powder) Frozen peas and carrots Canned corn Vegetable oil Instructions Prep (5 min): Break up cold rice with a fork. Drain the corn.

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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…

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Advanced Longevity Plan (Biohacker)

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

GLM 5.3851 words

3-Month Advanced Longevity & Performance Optimization Protocol Note: This is an educational framework. Get baseline bloodwork and consult a physician before starting supplements/fasting, especially with any medical conditions or medications.

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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.

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Our Verdict

GLM 5.3

GPT-4.5

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

GLM 5.3 costs 73x less per token.

Too close to call

API pricing

Cost per 1M tokens

GLM 5.3

Input

$0.65

115× cheaper

Output

$2.05

73× cheaper

GPT-4.5

Input

$75.00

Output

$150.00

GLM 5.3 is cheaper on both: 115× input, 73× output.

Where to run it

30 hosts, cheapest first

GLM 5.330 hosts

HostInOutContextUptime

DeepInfrafp4$0.56 in$2.50 out1M97.1% up Morph$0.71 in$2.24 out1M99.7% up Rekafp8$0.76 in$2.57 out262k99.4% up Sail Researchfp8$0.77 in$4.00 out1M99.8% up Novitafp8$0.78 in$2.46 out1M99.9% up io.netfp8$0.82 in$2.77 out262k99.8% up

24 more hosts

GPT-4.5

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Same prompt, both answers

Simple 7-Ingredient Recipe

Advanced Longevity Plan (Biohacker)

Cost per 1M tokens

30 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 and GPT-4.5?

Which is better, GLM 5.3 or GPT-4.5?

How much does GLM 5.3 cost compared to GPT-4.5?

How can I compare GLM 5.3 and GPT-4.5 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Same prompt, both answers

Simple 7-Ingredient Recipe

Advanced Longevity Plan (Biohacker)

Cost per 1M tokens

30 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 and GPT-4.5?

Which is better, GLM 5.3 or GPT-4.5?

How much does GLM 5.3 cost compared to GPT-4.5?

How can I compare GLM 5.3 and GPT-4.5 on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages