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

GLM 5.3 is developed by Zhipu AI while GPT-5 is developed by OpenAI. GLM 5.3 has a 1.3M token context window vs GPT-5's 400K. You can compare their actual outputs across 3 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 or GPT-5?

It depends on your use case. GLM 5.3 and GPT-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 cost compared to GPT-5?

GLM 5.3 costs $0.6538/M input tokens and GPT-5 costs $1.25/M input tokens. GLM 5.3 is $0.60/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-5 on Rival?

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

GLM 5.3 is cheaper than GPT-5 at $0.6538/M vs $1.25/M input tokens.

GLM 5.3 and GPT-5 compared across 3 shared prompts
Spec	GLM 5.3	GPT-5
Input price	$0.6538/M tokens	$1.25/M tokens
Output price	$2.0548/M tokens	$10/M tokens
Context window	1.3M tokens	400K tokens
Weights	Open	Closed
Free API (OpenRouter)	No	No
Released	Aug 2026	Aug 2025

Our Verdict

GLM 5.3

GPT-5

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

GLM 5.3 costs 4.9x less per token.

Too close to call

API pricing

Cost per 1M tokens

GLM 5.3

Input

$0.65

1.9× cheaper

Output

$2.05

4.9× cheaper

GPT-5

Input

$1.25

Output

$10.00

GLM 5.3 is cheaper on both: 1.9× input, 4.9× output.

Where to run it

32 hosts, cheapest first

GLM 5.330 hosts

HostInOutContextUptime

Baidu Qianfanfp8$0.65 in$2.05 out1M99.8% up Morph$0.65 in$2.06 out1M99.5% up Rekafp8$0.76 in$2.57 out262k98% up Novitafp8$0.78 in$2.46 out1M93.9% up io.netfp8$0.79 in$2.68 out262k99.3% up Phala$0.84 in$2.64 out1M99.5% up

24 more hosts

DeepInfrafp4$0.90 in$3.00 out1M97.9% up InferenceNetfp4$0.90 in$3.00 out1M95.1% up DigitalOcean$0.91 in$2.86 out1M71.9% up Inceptronfp4$1.01 in$3.29 out1M98.5% up Sail Researchfp8$1.02 in$3.29 out1M95.3% up GMI Cloudfp8$1.05 in$3.30 out1M99.1% up Makorafp4$1.05 in$4.20 out980k88.8% up SiliconFlowfp8$1.12 in$3.52 out1M99.6% up Alibaba Cloud$1.19 in$3.74 out1M100% up Decartfp4$1.19 in$3.74 out1M98.3% up Friendli$1.26 in$3.96 out1M100% up AkashMLfp8$1.30 in$4.40 out1M99.9% up AtlasCloudfp8$1.40 in$4.40 out1M99% up Basetenfp4$1.40 in$4.40 out1M99.6% up Cloudflare Workers AI$1.40 in$4.40 out1.3M100% up Crusoefp4$1.40 in$4.40 out1M97.3% up Fireworks$1.40 in$4.40 out1M99.5% up Mistralnvfp4$1.40 in$4.40 out1M99.8% up Modal$1.40 in$4.40 out1M97.2% up Parasailfp8$1.40 in$4.40 out1M98.7% up Venice$1.40 in$4.40 out1M70.5% up Wafer$1.40 in$4.40 out1M99% up Z.aifp8$1.40 in$4.40 out1M99.9% up Togetherdegraded$1.40 in$4.40 out1M97.5% up

GPT-52 hosts

HostInOutContextUptime

Azure AI Foundry$1.25 in$10.00 out400k100% up OpenAI$1.25 in$10.00 out400k100% up

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

Research

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More comparisons

Cost per 1M tokens

32 hosts, cheapest first

What we learned reading every model

Common questions

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

Which is better, GLM 5.3 or GPT-5?

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

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

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Cost per 1M tokens

32 hosts, cheapest first

What we learned reading every model

Common questions

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

Which is better, GLM 5.3 or GPT-5?

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

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

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages