GLM-4.5 TPS calculator
Each card below is assessed against this model at the context length and minimum quality you choose. Speed is an estimate for a single request, calculated from the card's memory bandwidth and the size of the model once compressed.
Calculated for this model
818 cards we hold specifications for
Smallest card that fits
Radeon Instinct MI325X
256 GB · Q4_K_M · 12.9 tok/s
Fastest card
B300
17.0 tok/s · 288 GB
Which GPUs can run GLM-4.5?
Set the inputs, read the answer
A longer conversation needs more memory, which can push this model off smaller cards.
Hides cards that would only fit the model by compressing it below this point.
4 cards match
Calculating| Needs | Quantisation | Fit | |||||
|---|---|---|---|---|---|---|---|
|
17.0
tok/s
10–27 · low confidence |
B300 NVIDIA | 288 GB | 8,000 GB/s | Sep 2025 | 256.8 GB | Q5_K_M | Tight |
|
13.6
tok/s
8–22 · low confidence |
Radeon Instinct MI350X AMD | 288 GB | 8,190 GB/s | Jan 2025 | 256.8 GB | Q5_K_M | Tight |
|
13.6
tok/s
8–22 · low confidence |
Radeon Instinct MI355X AMD | 288 GB | 8,190 GB/s | Jan 2025 | 256.8 GB | Q5_K_M | Tight |
|
12.9
tok/s
8–21 · low confidence |
Radeon Instinct MI325X AMD | 256 GB | 6,000 GB/s | Oct 2024 | 215.5 GB | Q4_K_M | Tight |
Speeds are estimates for a single request — one conversation at a time — calculated from memory bandwidth, model size and quantisation. Real throughput varies with the inference runtime and its version. Figures published by hardware vendors measure many simultaneous requests and are much higher.
On record
Full specification
Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.
Origin
Who built this model, where, and when it was published.
- Organisation
- Z.ai (Zhipu AI),Tsinghua University
- Organisation type
- Industry,Academia
- Country
- China
- Published
- 5 August 2025
- Authors
- Bin Chen, Chengxing Xie, Cunxiang Wang, Da Yin, Hao Zeng, Jiajie Zhang, Kedong Wang, Lucen Zhong, Mingdao Liu, Rui Lu, Shulin Cao, Xiaohan Zhang, Xuancheng Huang, Yao Wei, Yean Cheng, Yifan An, Yilin Niu, Yuanhao Wen, Yushi Bai, Zhengxiao Du, Zihan Wang (汪子涵), Zilin Zhu
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Language
- Task
- Language modeling/generation, Question answering, Code generation, Quantitative reasoning
Size
How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.
- Parameters
- 355B
- Training data
- 23,100,000,000,000 tokens
- Batch size
- 64,000,000
355 billion total parameters with 32 billion active parameters
23T tokens
"We used a batch size warmup strategy, where the batch size was gradually increased from 16M tokens to 64M tokens in the training of the first 500B token"
Training compute
The arithmetic performed to train the model, measured in floating-point operations. It is a measure of what the training run cost, not of how fast the finished model answers you.
- Training compute
- 4.4 × 10²⁴ FLOP
- How it was established
- Operation counting
(6 FLOP/token/parameter) * (23T tokens) * (32B active parameters) = 4.42e24 FLOP
Availability
Whether you can obtain the model and run it on your own hardware, which is what decides if any of the graphics-card figures on this page apply.
- Weights
- Open — downloadable
- Model access
- Open weights (unrestricted)
- Training code
- Unreleased
- Hugging Face
- zai-org
MIT license https://huggingface.co/zai-org/GLM-4.5 Apache 2.0 (Inference code) https://github.com/zai-org/GLM-4.5?tab=readme-ov-file
How it is classified
Labels the source dataset applies when tracking notable models, and how confident it is in the entry.
- Why it is tracked
- Discretionary
- Record confidence
- Confident
Sources
Where this record came from and when it was last checked.
- Reference
- GLM-4.5: Agentic, Reasoning, and Coding (ARC) Foundation Models
- Last updated
- 30 December 2025
The extremes
The ten fastest GPUs that run GLM-4.5
Ranked by estimated tokens per second, newest card first where speeds tie. Because generation is bound by memory bandwidth, this ordering follows bandwidth rather than any gaming benchmark.
The smallest GPUs that still run GLM-4.5
The cheapest route in, by memory capacity. A tight fit runs the model but leaves nothing spare for a longer conversation.
What the numbers mean
The hardware side
Minimum card
Radeon Instinct MI325X
Memory needed
215.5 GB
Fastest
17.0 tok/s
GLM-4.5 reaches a parameter count of 355B. That is beyond what any single graphics card holds. Running it means either splitting it across several cards or renting hardware built for the job, and every card able to hold it alone is a datacentre part. The number that can: 4.
At the low end it is handled by Radeon Instinct MI325X, with a memory capacity of 256 GB, running it at a compression of Q4_K_M and producing around 12.9 tokens per second.
Top of the range is B300, generating roughly 17.0 tokens per second on the strength of a memory bandwidth of 8,000 GB/s.
What this model is
GLM-4.5 was published by Z.ai (Zhipu AI),Tsinghua University, in the country recorded as China, during August 2025. It comes out of an organisation categorised as industry,Academia.
It works in the domain of Language, and is recorded as performing the task of language modeling/generation, Question answering, Code generation, Quantitative reasoning.
The weights are published, so it can be downloaded and run on your own hardware indefinitely, offline, with no account attached. On Hugging Face it is published under the organisation zai-org.
What decides the speed
Across every card that can run it, the middle of the range sits at 13.6 tokens per second. Exceeding reading speed outright: 4 of them.
Being dense, it reads all of itself per token, which is why the ordering by speed below follows the ordering by memory bandwidth so closely.
Memory here is estimated from size rather than computed from the architecture, which is not recorded for this model — the numbers are indicative rather than exact.
Training and provenance
Training it took a computation budget of roughly 4.4 × 10²⁴ FLOP. That figure measures what producing the model cost, and has no bearing on how fast it answers.
It was trained on a corpus of about 23,100,000,000,000 tokens of text.
The reason it appears in this catalogue at all: discretionary.
Step by step
How to choose a GPU for GLM-4.5
The table above has already assessed every card we hold specifications for against this model. Getting to your answer takes six steps.
-
01
Start from the memory column
Start from what it actually needs, which is the requirement of GLM-4.5, needing around 215.5 GB at a compression of Q4_K_M. No amount of processing power compensates for a card that cannot hold it.
-
02
Decide how long your conversations run
The conversation occupies memory too, and grows as it goes. Set the slider to the length you expect, because at long context a card that handles short questions easily can be dropped by GLM-4.5.
-
03
Set a quality floor
Compression is what makes a model fit smaller cards, at some cost in accuracy, reaching a compression of Q4_K_M on the smallest card that fits. Setting a minimum quality drops the cards that only manage it by squeezing further than you would want, and holds the comparison at one level.
-
04
Sort by speed
The speed ordering is effectively an ordering by memory bandwidth, for GLM-4.5. It will not match a gaming ordering, because generation is bound by memory bandwidth. The card topping the list is B300, at 17.0 tok/s.
-
05
Look at the headroom, not just the fit
Tight means it loads and works with no room to raise the context later, in the case of GLM-4.5. Comfortable means you can grow the context later. That difference matters more than a few tokens per second, so buy for comfortable if you expect to.
-
06
Open the card you have settled on
Every card name links to its own page, which runs the same calculation across the whole model catalogue. A card is usually bought for more than one model, so it is worth a look before buying for GLM-4.5.
Answers
GLM-4.5 — common questions
GLM-4.5— can I run it if it does not fit in my GPU?
Only by offloading, which is usually a false economy: the part held in system memory drags the whole thing down. The nearest miss we calculate falls short by 42.7 GB. Every figure here assumes the whole model is resident on the card.
GLM-4.5— would two GPUs run it faster?
Two cards buy memory rather than speed, which matters only if one card cannot hold it. The number that can: 4. So a second card is rarely the answer here.
GLM-4.5— why does the quantisation differ between cards?
A larger card holds a more accurate copy. The number of compression levels used across the cards that run it: 2. Bigger cards get the more accurate version, and the quality floor above pins the comparison to one level.
GLM-4.5— how accurate are these speed estimates?
They are calculated from specifications rather than measured, and each carries a range. One example: 10–27 tok/s on B300. The same model and card vary by thirty to fifty per cent depending on the inference software and its version.
GLM-4.5— what GPU do I need to run it?
The smallest card in our catalogue that holds it is Radeon Instinct MI325X, with a memory capacity of 256 GB. It runs the model at a compression of Q4_K_M using about 215.5 GB, and produces roughly 12.9 tokens per second. The number of cards able to run it in total: 4.
GLM-4.5— how fast is it on a GPU?
It depends on the card. The quickest we calculate is B300, at about 17.0 tokens per second; the slowest that still runs it manages considerably less. Reading speed is around ten tokens per second, and the number of cards clearing that: 4.
GLM-4.5— how much VRAM does it need?
It needs about 215.5 GB at a compression of Q4_K_M, which is what the smallest card that runs it uses. Less compression needs more: the figures in the memory column above are recalculated for each card, because each one holds the least-compressed version it can.
GLM-4.5— is it open source?
Its weights are published, so it can be downloaded and run on your own hardware. Note that open weights is not the same as open source in the full sense — it says nothing about the training data, the training code, or the commercial terms attached.
GLM-4.5— how many parameters does it have?
It has a parameter count of 355B. 355 billion total parameters with 32 billion active parameters. That figure is the total, and it is what decides how much memory the model needs — roughly half a gigabyte per billion at the compression most people use.
GLM-4.5— who created it?
It was published by Z.ai (Zhipu AI),Tsinghua University, based in China, an organisation categorised as industry,Academia.
GLM-4.5— when was it released?
It was published in August 2025.
GLM-4.5— what is it used for?
It works in the domain of Language, and is recorded as handling the task of language modeling/generation, Question answering, Code generation, Quantitative reasoning. Models frequently carry more than one of each, and the tags describe purpose rather than capability limits.
GLM-4.5— where can I download it?
Its weights are published on Hugging Face, under the organisation zai-org. We do not host model files — this site calculates what hardware is needed to run them.
GLM-4.5— how much compute was used to train it?
Training consumed around 4.4 × 10²⁴ FLOP. That measures what producing the model cost and says nothing about how quickly it answers once trained — inference speed comes from memory bandwidth, not from the training budget.
The other direction
Looking at it from the other side?
This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.