What is the difference between GLM 5.3 Flash and GPT-5 Mini?

GLM 5.3 Flash is developed by Zhipu AI while GPT-5 Mini is developed by OpenAI. You can compare their actual outputs across 15 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 Flash or GPT-5 Mini?

It depends on your use case. GLM 5.3 Flash and GPT-5 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 15 challenges so you can judge which fits your needs best.

How much does GLM 5.3 Flash cost compared to GPT-5 Mini?

GLM 5.3 Flash costs $0.15/M input tokens and GPT-5 Mini costs $0.25/M input tokens. GLM 5.3 Flash is $0.10/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 Flash and GPT-5 Mini on Rival?

This page shows a side-by-side comparison of GLM 5.3 Flash and GPT-5 Mini 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 5.3 FlashvsGPT-5 Mini

GLM 5.3 Flash is cheaper than GPT-5 Mini at $0.15/M vs $0.25/M input tokens.

GLM 5.3 Flash and GPT-5 Mini compared across 15 shared prompts
Spec	GLM 5.3 Flash	GPT-5 Mini
Input price	$0.15/M tokens	$0.25/M tokens
Output price	$0.5/M tokens	$2/M tokens
Context window	1.3M tokens	—
Weights	Open	Closed
Free API (OpenRouter)	No	No
Released	Aug 2026	Aug 2025

Side by side

Same prompt, both answers

Opening lines from 4 of the 15 prompts 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 Flash205 words

Golden Hour Garlic Butter Pasta A silky, savory pasta that comes together faster than delivery! Ingredients (serves 2): 8 oz spaghetti or any pasta 4 tbsp butter 4 cloves garlic, minced (or 1 tsp garlic powder) ½ cup grated Parmesan cheese ½ cup pasta water (reserved) 1 tsp red pepper flakes Salt Prep time: 5 minutes…

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GPT-5 Mini255 words

Sunfire Chickpea Skillet Yields: 3–4 servings Prep time: 8 minutes Cook time: 15–20 minutes Total time: ~25–28 minutes Ingredients (7 pantry staples) 2 tbsp olive oil 1 medium onion, diced 3 cloves garlic, minced 1 tsp smoked paprika (or regular paprika) 2 (15 oz) cans chickpeas, drained and rinsed 1 (15 oz) can diced…

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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…

GLM 5.3 Flash327 words

1-Month Beginner Health & Longevity Plan 🥗 Area 1: Diet — "Add Before You Subtract" Week 1: Add one vegetable or fruit to every meal. Don't cut anything yet—just add. Week 2: Swap one sugary drink per day for water or unsweetened tea.

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GPT-5 Mini1,224 words

Great — here’s a simple, practical 1-month starter plan focused on three high-impact areas for health and longevity: Diet, Exercise (movement + strength), and Sleep. The plan is beginner-friendly, progressive, and designed to build lasting habits.

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Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

GLM 5.3 Flash518 words

HarborTech Services — 5-Year LBO Summary Entry Math EV = 12.0x × $120m = $1,440.0m; Fees (2%) = $28.8m; Total uses = $1,468.8m Debt: TL = 4.0x × 120 = $480.0m; Mezz = 1.5x × 120 = $180.0m; Total = $660.0m (5.5x) Sponsor equity = $808.8m Base Case Projection ($m) FY26 FY27 FY28 FY29 FY30 Revenue 972.0 1,039.7 1,102.1…

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GPT-5 Mini1,248 words

Summary of transaction math (at close / FY2025) EV (purchase price) = 12.0x * FY2025 EBITDA = 12.0 * $120.0m = $1,440.0m Transaction fees (paid by equity at close) = 2.0% * EV = 0.02 * $1,440.0m = $28.8m Total debt at close = 5.5x * $120m = $660.0m Term Loan = 4.0x = $480.0m (9.0% cash interest, 1.0% p.a.

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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 Flash1,294 words

90-Day Longevity Optimization Protocol ⚠️ Medical disclaimer: This is an educational framework, not medical advice. Before starting, complete baseline labs and consult a physician—especially before fasting, supplements (rapamycin off-label use, high-dose anything), or if you have any health conditions.

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GPT-5 Mini626 words

Important safety first: this plan is informational and ambitious. Before starting, get medical clearance (especially if you have chronic illness, take medications, are pregnant/breastfeeding, or are >65).

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Our Verdict

GLM 5.3 Flash

GPT-5 MiniRunner-up

Not enough votes to call it. On the specs, GLM 5.3 Flash has the edge: bigger model tier, newer, bigger context window.

GLM 5.3 Flash costs 4.0x less per token.

Too close to call

API pricing

Cost per 1M tokens

GLM 5.3 Flash

Input

$0.15

1.7× cheaper

Output

$0.50

4.0× cheaper

GPT-5 Mini

Input

$0.25

Output

$2.00

GLM 5.3 Flash is cheaper on both: 1.7× input, 4.0× output.

Where to run it

32 hosts, cheapest first

GLM 5.3 Flash30 hosts

HostInOutContextUptime

DeepInfrafp4$0.07 in$0.25 out1M99.1% up GMI Cloudfp8$0.07 in$0.25 out1M99.2% up Morph$0.08 in$0.28 out1M100% up InferenceNetfp4$0.09 in$0.28 out1M97.5% up Wafer$0.10 in$0.35 out1M99.7% up OpenInferencefp4$0.10 in$0.50 out1M98.6% up

24 more hosts

Relace$0.11 in$0.36 out1M99.7% up Phalafp8$0.13 in$0.42 out1M99.5% up Novitafp8$0.13 in$0.44 out1M99.4% up StreamLakefp8$0.14 in$0.47 out1M99% up Sail Researchfp8$0.14 in$0.47 out1M99% up AtlasCloudfp8$0.15 in$0.50 out1M99.6% up Basetenfp8$0.15 in$0.50 out1M98.7% up CoreWeavenvfp4$0.15 in$0.50 out1M99.5% up DigitalOcean$0.15 in$0.50 out1M93.7% up Fireworks$0.15 in$0.50 out1M99% up Friendli$0.15 in$0.50 out1M98.7% up Inceptronfp8$0.15 in$0.50 out1M98.2% up io.netfp8$0.15 in$0.50 out262k99.2% up Near AIfp8$0.15 in$0.50 out1M98.9% up Parasailfp8$0.15 in$0.50 out1M98.7% up Rekafp8$0.15 in$0.50 out262k98.9% up SiliconFlowfp8$0.15 in$0.50 out1M99.7% up Together$0.15 in$0.50 out1M99.5% up Venice$0.15 in$0.50 out1M98.8% up Z.aifp8$0.15 in$0.50 out1M96.5% up NextBitfp8$0.18 in$0.60 out1M97.9% up Cloudflare Workers AI$0.30 in$1.00 out1.3M99.8% up Modalfp8$0.45 in$1.50 out1M99.6% up Crusoefp4degraded$0.15 in$0.50 out1M93% up

GPT-5 Mini2 hosts

HostInOutContextUptime

Azure AI Foundry$0.25 in$2.00 out400k100% up OpenAI$0.25 in$2.00 out400k100% up

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

Research

What we learned reading every model

FAQ

Common questions

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More comparisons

Same prompt, both answers

Cost per 1M tokens

32 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 Flash and GPT-5 Mini?

Which is better, GLM 5.3 Flash or GPT-5 Mini?

How much does GLM 5.3 Flash cost compared to GPT-5 Mini?

How can I compare GLM 5.3 Flash and GPT-5 Mini on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Same prompt, both answers

Cost per 1M tokens

32 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between GLM 5.3 Flash and GPT-5 Mini?

Which is better, GLM 5.3 Flash or GPT-5 Mini?

How much does GLM 5.3 Flash cost compared to GPT-5 Mini?

How can I compare GLM 5.3 Flash and GPT-5 Mini on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages