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

GLM 5.3 Prime is developed by Z.ai while GPT-4.5 is developed by OpenAI. GLM 5.3 Prime has a 1.0M token context window vs GPT-4.5's 128K. You can compare their actual outputs across 3 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 Prime or GPT-4.5?

It depends on your use case. GLM 5.3 Prime and GPT-4.5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 3 challenges so you can judge which fits your needs best.

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

GLM 5.3 Prime costs $2.8/M input tokens and GPT-4.5 costs $75/M input tokens. GLM 5.3 Prime is $72.20/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 Prime and GPT-4.5 on Rival?

This page shows a side-by-side comparison of GLM 5.3 Prime 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 Sep 2026

GLM 5.3 PrimevsGPT-4.5

GLM 5.3 Prime is cheaper than GPT-4.5 at $2.8/M vs $75/M input tokens.

GLM 5.3 Prime and GPT-4.5 compared across 3 shared prompts
Spec	GLM 5.3 Prime	GPT-4.5
Input price	$2.8/M tokens	$75/M tokens
Output price	$8.8/M tokens	$150/M tokens
Context window	1.0M tokens	128K tokens
Free API (OpenRouter)	No	No
Released	Sep 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 5.3 Prime212 words

Golden Comfort Garlic Butter Pasta A cozy, restaurant-worthy dish made from everyday pantry staples! Ingredients (7 total) Spaghetti (or any pasta) Butter Garlic (3–4 cloves) Olive oil Parmesan cheese (grated) Red pepper flakes Salt Instructions Boil the pasta – Bring a large pot of salted water to a boil.

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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 5.3 Prime232 words

3-Month Advanced Longevity Optimization Protocol Disclaimer: This is educational content, not medical advice. Consult a physician before starting supplements, fasting, or intense exercise—especially if you take medications (e.g., statins, blood thinners, diabetes meds) or have chronic conditions.

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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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Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

GLM 5.3 Prime962 words

"Tidal Memory" A multi-component tasting course Conceptual Narrative This dish explores the meeting point of forest and ocean — specifically, the moment when coastal fog rolls over a pine forest at low tide.

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GPT-4.5322 words

Dish Title: "Ocean & Earth Symphony: Kombu-Cured Venison, Sea Urchin Custard, Black Garlic Soil, and Smoked Cherry Blossom Emulsion" Conceptual Narrative: This composition embodies the delicate interplay between land and sea, exploring the subtle yet profound connection between umami-rich sea elements and earthy forest…

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Our Verdict

GLM 5.3 Prime

GPT-4.5

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

GLM 5.3 Prime costs 17x less per token.

Too close to call

API pricing

Cost per 1M tokens

GLM 5.3 Prime

Input

$2.80

27× cheaper

Output

$8.80

17× cheaper

GPT-4.5

Input

$75.00

Output

$150.00

GLM 5.3 Prime is cheaper on both: 27× input, 17× output.

Where to run it

1 host

GLM 5.3 Prime1 host

HostInOutContextUptime

Alibaba Cloud$2.80 in$8.80 out1M99.9% up

GPT-4.5

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

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