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GLM-5.3: fiche technique, prix API et données

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Z.ai GLM-5.3 — drawn card, not a photograph of the product

Z.aiAI Models & LLMs

Context window
1M tokens
Maximum output
128k tokens
Input cost per 1M tokens
$1.40
Output cost per 1M tokens
$4.40
Open weights (downloadable)
Yes

You use it and pay per use through the vendor's API, per million tokens: there is no shop. The list prices are in the data sheet below.

Official page: docs.z.ai ↗Official page: huggingface.co ↗

Data sheet · GLM-5.3

Every figure is quoted from the vendor's official page, with the date we read it. If a row is missing, the source does not state it and we do not estimate it.

Memory and answer length

Context window
1M tokensRank 8 of 21
What it means and the source

How much text the model keeps in view in a single request, question and answer included. It matters for long documents and whole code projects. A token is a fragment of a word.

docs.z.aiOpens the source in a new tab Oct 23, 2026
Maximum output
128k tokensRank 3 of 16
What it means and the source

The longest answer it can write in one go: useful for reports, long code or translations of whole documents.

docs.z.aiOpens the source in a new tab Oct 23, 2026

API prices

Input cost per 1M tokens
$1.40Rank 9 of 21
What it means and the source

What it costs to have the model read a million tokens (your question, the documents, the code). It is the official list price, before discounts.

docs.z.aiOpens the source in a new tab Oct 23, 2026
Cached input cost per 1M tokens
$0.26Rank 15 of 20
What it means and the source

The reduced price when part of the request is identical to one sent recently, for example the same instructions or the same document: the vendor keeps it in memory and charges less for it.

docs.z.aiOpens the source in a new tab Oct 23, 2026
Output cost per 1M tokens
$4.40Rank 8 of 21
What it means and the source

What a million tokens written by the model cost. It usually costs more than the input and is the figure to watch when answers are long.

docs.z.aiOpens the source in a new tab Oct 23, 2026

Size and openness

Parameters
753 billion
What it means and the source

The size of the network: how many billions of learned values make it up. Bigger does not necessarily mean better, but it tells how much hardware it takes to run it yourself.

huggingface.coOpens the source in a new tab Oct 23, 2026
Open weights (downloadable)
Yes7 models out of 23
What it means and the source

The model's weights can be downloaded: you can run it on your own servers, adapt it and decide where the data stays, within the licence terms.

huggingface.coOpens the source in a new tab Oct 23, 2026

Where it stands · GLM-5.3

The same verified figures, next to those of the other catalogue models. Tap a model for the head-to-head.

Context windowRank 8 of 21 · higher is better
  1. 1GPT-5.6 Sol1.05M tokens
  2. 1GPT-6 Astra1.05M tokens
  3. 1GPT-6 Luna1.05M tokens
  4. 1GPT-6.1 Sol1.05M tokens
  5. 5Gemini 3.8 Flash1,048,576 tokens
  6. 8GLM-5.31M tokens
Maximum outputRank 3 of 16 · higher is better
  1. 1DeepSeek V4 Pro384k tokens
  2. 1DeepSeek V4.1 Flash384k tokens
  3. 3GLM-5.3128k tokens
  4. 3Claude Fable 5.1128k tokens
  5. 3Claude Haiku 5.5128k tokens
  6. 3Claude Opus 5.5128k tokens
Input cost per 1M tokensRank 9 of 21 · lower is better
  1. 1Claude Haiku 5.5$0.10
  2. 1GPT-6 Luna$0.10
  3. 3DeepSeek V4.1 Flash$0.30
  4. 4GLM-4.6$0.60
  5. 5Gemini 3.8 Flash$0.75
  6. 9GLM-5.3$1.40
Output cost per 1M tokensRank 8 of 21 · lower is better
  1. 1Claude Haiku 5.5$0.50
  2. 1GPT-6 Luna$0.50
  3. 3DeepSeek V4.1 Flash$1.20
  4. 4GLM-4.6$2.20
  5. 5GLM-5$3.20
  6. 8GLM-5.3$4.40

Hardware to try AI at home

GLM-5.3: just holding the weights in memory takes about 1,506 GB at 16-bit, 753 GB at 8-bit, 376.5 GB at 4-bit. Beyond 24 GB it is not a home-PC job: using it through an API makes more sense.Worked out from the billions of parameters the vendor states, not a measurement: context and the runtime need more memory.

Questions and answers

GLM-5.3: how much does it cost through the API?

The official list price is $1.40 per 1M input tokens and $4.40 per 1M output tokens.

GLM-5.3: how much text can it read at once?

The context window is 1M tokens. It can write answers of up to 128k tokens.

GLM-5.3: can I run it on my own computer?

Yes, the vendor publishes the model's weights. Parameters: 753 billion. Holding them in memory takes about 376.5 GB at 4-bit; context and the runtime need more memory.

L’essentiel

Sur Z.ai GLM-5.3, la donnée qui compte vraiment est Fenêtre de contexte : 1M. Je l’ai relevé chez Z.ai – GLM-5.3. Parmi les 21 que j’ai vérifiés, 7 font mieux. L’autre chiffre à regarder est Coût par million de jetons en sortie : 4.4.

Les chiffres de Z.ai GLM-5.3

Je les ai classés par importance, avec la valeur et la position face aux autres que j’ai vérifiés.

Fenêtre de contexte : 1M. Position 8 sur les 21 que j’ai comparés.

Coût par million de jetons en sortie : 4.4. Position 8 sur les 21 que j’ai comparés.

Coût par million de jetons en entrée : 1.4. Position 9 sur les 21 que j’ai comparés.

Coût d’entrée en cache par 1M de tokens (USD) : 0.26. Position 6 sur les 20 que j’ai comparés.

Open weights (downloadable) : 1. C’est la meilleure valeur parmi les 7 que j’ai comparés.

Paramètres (milliards) : 753B. Position 4 sur les 7 que j’ai comparés.

Subject illustration: Illustration of an application (illustrative image, not a photo of the product)
À qui il s’adresse

Choisis-le si Open weights (downloadable) est ta priorité : 1, et aucun de ceux que j’ai vérifiés ne fait mieux.

Regarde ailleurs si ce qui compte pour toi est Fenêtre de contexte : ici c’est 1M, et 7 produits font mieux.

Pour aller plus loin

Sources

Ask Sir Compare:Explain these numbers to me

Reviews and tests

Z.ai GLM-5.3

Reviews and tests · Z.ai GLM-5.3

Reviews are not available yet.

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