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GLM-Z1-Rumination-32B-0414

zai-org/GLM-Z1-Rumination-32B-0414

GLM-Z1-Rumination-32B-0414 at Q4_K_M is exactly 20,040,332,576 bytes (18.66 GiB / 20.04 GB) — an effective 4.838 bits per weight, not the nominal 4. Its KV cache at 32K is 7.63 GiB.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
33.1B
Architecture
glm4
61 layers
Context
131,072
native (config.json)
License
mit

Shipped quantizations

● exact bytes, summed from published files
QuantSize●Exact bytes●Effective bpw●Tensors●Publisher
IQ2_XS9.45 GiB10,145,986,1122.449—bartowski
IQ2_S9.93 GiB10,665,006,6562.574—bartowski
IQ2_M10.74 GiB11,527,525,9522.783—bartowski
Q2_K11.69 GiB12,548,609,6003.029—bartowski
IQ3_XXS12.14 GiB13,038,212,6723.147—bartowski
Q2_K_L12.53 GiB13,457,921,6003.249—bartowski
IQ3_XS12.98 GiB13,933,614,6563.363—bartowski
Q3_K_S13.62 GiB14,619,039,2963.529—bartowski
IQ3_M14.07 GiB15,107,438,1443.647—bartowski
Q3_K_M15.07 GiB16,177,329,7283.905—bartowski
Q3_K_L16.33 GiB17,537,856,8004.233—lmstudio-community
Q3_K_L16.33 GiB17,537,857,0884.233—bartowski
IQ4_XS16.72 GiB17,950,242,3684.333—bartowski
IQ4_NL17.64 GiB18,944,783,9364.573—bartowski
Q4_017.66 GiB18,958,743,1044.576—bartowski
Q4_K_S17.72 GiB19,023,820,3524.592—bartowski
Q4_K_M18.66 GiB20,040,332,5764.838—lmstudio-community
Q4_K_M18.66 GiB20,040,332,8644.838—bartowski
Q4_K_L19.31 GiB20,731,409,9845.004—bartowski
Q4_119.47 GiB20,909,880,8965.047—bartowski
Q5_K_S21.35 GiB22,922,950,2085.533—bartowski
Q5_K_M21.90 GiB23,512,036,9285.676—bartowski
Q5_K_L22.43 GiB24,086,722,1125.814—bartowski
Q6_K25.33 GiB27,200,722,2086.566—lmstudio-community
Q6_K25.33 GiB27,200,722,4966.566—bartowski
Q6_K_L25.75 GiB27,651,741,2486.675—bartowski
Q8_032.81 GiB35,226,875,1688.503—lmstudio-community
Q8_032.81 GiB35,226,875,4568.503—bartowski
BF162 shards61.74 GiB66,295,854,56016.003—bartowski

KV cache by context

computed per layer
ContextKV cache (f16)●Flat formulaOverstated byFull / windowed / recurrent
4,0960.95 GiB0.95 GiB—61 / 0 / 0
8,1921.91 GiB1.91 GiB—61 / 0 / 0
16,3843.81 GiB3.81 GiB—61 / 0 / 0
32,7687.63 GiB7.63 GiB—61 / 0 / 0
65,53615.25 GiB15.25 GiB—61 / 0 / 0
131,07230.50 GiB30.50 GiB—61 / 0 / 0

Compare with

same modality, comparable size
vs Qwen3-Coder-30B-A3B-Instructvs Qwen3.6-27Bvs Qwen3.8-27Bvs gemma-4-12B-it-qat-q4_0-unquantizedvs gemma-4-E4B-itvs Qwen3-30B-A3B-Thinking-2507All alternatives →Will it fit on my card? →

Will it run on your card?

full quant x context sweep
By VRAM:8GB12GB16GB24GB32GB48GB
Radeon RX 6500 XT 4GBGeForce RTX 3050 6GBGeForce RTX 5050 8GBGeForce RTX 3080 10GBGeForce RTX 2080 Ti 11GBGeForce RTX 5070 12GBGeForce RTX 5060 Ti 16GBApple M3 Pro 18GBGeForce RTX 3080 Ti 20GBGeForce RTX 5090 D V2 24GBGeForce RTX 5090 D 32GBApple M5 Max 36GBApple M5 Pro 48GBApple M5 Max 64GBApple M3 Ultra 96GBApple M5 Max 128GBApple M2 Ultra 192GBApple M3 Ultra 256GBApple M3 Ultra 512GB

Why other calculators give a different number

A parameters × bits ÷ 8 estimate puts Q4_K_M at roughly 17.36 GiB. The real file is 18.66 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
61
Attention heads
48
KV heads
8
Head dim
128
Hidden size
6144
Vocab
151,552
Sliding window
none
SWA period
—
MLA
no
Experts
—
Experts per token
—
use_sliding_window
—

Questions people ask

How much VRAM does GLM-Z1-Rumination-32B-0414 need?
Q4_K_M is exactly 20,040,332,576 bytes (18.66 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is GLM-Z1-Rumination-32B-0414's KV cache?
7.63 GiB at 32K context with an f16 cache, computed per layer. Quantizing the cache to q8_0 roughly halves it, which is often the difference between a context length fitting and not.
Which quantization of GLM-Z1-Rumination-32B-0414 should I use?
Q4_K_M is the usual default. Pick the largest quantization that fits your card at the context you actually need — the table above gives exact sizes for every one published.