zlab-princeton · text

Vero-Qwen35-9B-Base

zlab-princeton/Vero-Qwen35-9B-Base

Vero-Qwen35-9B-Base at I1-IQ1_S is exactly 2,742,644,640 bytes (2.55 GiB / 2.74 GB) — an effective 2.332 bits per weight, not the nominal 1. Its KV cache at 32K is 1.00 GiB.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
9.4B
Architecture
qwen35
32 layers
Context
262,144
native (config.json)
License
apache-2.0

Shipped quantizations

exact bytes, summed from published files
QuantSizeExact bytesEffective bpwTensorsPublisher
I1-IQ1_S2.55 GiB2,742,644,6402.332mradermacher
I1-IQ1_M2.68 GiB2,877,271,9682.446mradermacher
I1-IQ2_XXS2.89 GiB3,101,650,8482.637mradermacher
I1-IQ2_XS3.06 GiB3,285,348,2562.793mradermacher
I1-IQ2_S3.19 GiB3,427,970,9762.914mradermacher
I1-IQ2_M3.36 GiB3,607,474,0803.067mradermacher
I1-Q2_K_S3.44 GiB3,697,242,0163.143mradermacher
I1-Q2_K3.56 GiB3,827,265,4403.254mradermacher
I1-IQ3_XXS3.67 GiB3,938,168,7363.348mradermacher
I1-IQ3_XS3.95 GiB4,243,419,0403.608mradermacher
I1-Q3_K_S3.97 GiB4,259,409,8243.621mradermacher
I1-IQ3_S4.07 GiB4,370,821,0243.716mradermacher
I1-IQ3_M4.11 GiB4,415,385,5043.754mradermacher
I1-Q3_K_M4.31 GiB4,623,527,8403.931mradermacher
I1-Q3_K_L4.59 GiB4,925,517,7284.188mradermacher
I1-IQ4_XS4.84 GiB5,196,443,5524.418mradermacher
I1-Q4_04.96 GiB5,325,942,6884.528mradermacher
I1-Q4_K_S4.98 GiB5,351,632,8004.550mradermacher
I1-IQ4_NL5.05 GiB5,418,217,3764.606mradermacher
I1-Q4_K_M5.24 GiB5,629,112,2244.786mradermacher
I1-Q4_15.41 GiB5,809,336,2244.939mradermacher
I1-Q5_K_S5.87 GiB6,305,312,6725.361mradermacher
I1-Q5_K_M6.02 GiB6,467,973,0245.499mradermacher
I1-Q6_K6.85 GiB7,359,262,6246.257mradermacher

KV cache by context

computed per layer
ContextKV cache (f16)Flat formulaOverstated byFull / windowed / recurrent
4,0960.13 GiB0.50 GiB4.00×8 / 0 / 24
8,1920.25 GiB1.00 GiB4.00×8 / 0 / 24
16,3840.50 GiB2.00 GiB4.00×8 / 0 / 24
32,7681.00 GiB4.00 GiB4.00×8 / 0 / 24
65,5362.00 GiB8.00 GiB4.00×8 / 0 / 24
131,0724.00 GiB16.00 GiB4.00×8 / 0 / 24

24 of 32 layers use linear attention, which keeps a fixed-size recurrent state instead of a per-token cache. Those layers do not grow with context at all — treating them as ordinary attention, as a flat formula does, overstates this model's cache by roughly 4.0× at long context.

Compare with

same modality, comparable size

Will it run on your card?

full quant x context sweep

Why other calculators give a different number

A parameters × bits ÷ 8 estimate puts I1-IQ1_S at roughly 4.93 GiB. The real file is 2.55 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
32
Attention heads
16
KV heads
4
Head dim
256
Hidden size
4096
Vocab
248,320
Sliding window
none
SWA period
MLA
no
Experts
Experts per token
use_sliding_window

Questions people ask

How much VRAM does Vero-Qwen35-9B-Base need?
I1-IQ1_S is exactly 2,742,644,640 bytes (2.55 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is Vero-Qwen35-9B-Base's KV cache?
1.00 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 Vero-Qwen35-9B-Base 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.