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Open-weight model · Feature extraction

qwen3.5-4l-vocab40k-en-ko-headless

by Junsung Kim mp-juuuns/qwen3.5-4l-vocab40k-en-ko-headless

qwen3.5-4l-vocab40k-en-ko-headless is an open-weight model for feature extraction from Junsung Kim, released under Apache License 2.0. It has 121M parameters and a 262,144-token context. At 16-bit it needs about 0.3 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 873 downloads a month.

A headless four-layer text backbone distilled from Qwen3.5-0.8B, with a vocabulary cut to English and Korean. It has no language-model head, no classification head, no labels and no thresholds. You attach a head and train it.

Parameters121M
Context262,144
Weights1.6 GB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads873

Runs On

What it takes to serve qwen3.5-4l-vocab40k-en-ko-headless (121M parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 0.2 GB 0.3 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 0.1 GB 0.1 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00

Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Oct 7, 2026.

qwen3.5-4l-vocab40k-en-ko-headless on every accelerator the SAVRN Index prices, at every precision

Model Card

By Junsung Kim, published under apache-2.0, revision e906337bd193.

Qwen3.5 4L Headless Backbone (40k EN/KO)

A headless four-layer text backbone distilled from Qwen3.5-0.8B, with a vocabulary cut to English and Korean. It has no language-model head, no classification head, no labels and no thresholds. You attach a head and train it.

Korean translation of this page: README_KO.md.

This card is the record of how it was made. It walks the whole path — prompting the original model, turning it into a classifier, removing layers, changing precision, cutting the vocabulary, and cutting it again by rule — and shows what each step measured. We are not arguing that this model is better than anything. We built it, we measured it beside other models, and where we have a guess about why a number moved we say it is a guess.

Read the full model card (7,839 words)

Configuration

Architecture
Qwen3_5TextModel
Context length (tokens)
262,144
Layers
4
Hidden size
1,024
Feed-forward size
3,584
Attention heads
8
Key/value heads
2
Head dimension
256
Vocabulary size
39,866
Model type
qwen3_5_text

Identity and Version

Repository
mp-juuuns/qwen3.5-4l-vocab40k-en-ko-headless
Publisher
Junsung Kim
Task
Feature extraction
Modality
Text
Library
transformers
Parameters
121M parameters
Languages
en, ko
Revision
e906337bd193061825bcb3e24b34829a80e1779f
First published
2026-07-31
Last updated
2026-09-25

Files and Weights

377 files, 1.7 GB in total. The weights are 5 files totalling 1.6 GB in gguf, safetensors.

Weights5 files · 1.6 GB
Configuration231 files · 5.0 MB
Tokenizer13 files · 34.6 MB
Documentation26 files · 220.9 KB
Other99 files · 11.3 MB
Repository3 files · 3.3 KB
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models/semeval-propaganda/seeds/seed42/model.safetensorsWeights421.8 MB 2db5f4be391d
models/semeval-propaganda/seeds/seed43/model.safetensorsWeights421.8 MB 81a56d497df7
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License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
1.6 GB
Download from Junsung Kim

Released by Junsung Kim through its official repository on Hugging Face. Read the license.

Built From

Memory Requirements

PrecisionWeights in memory
As published1.6 GB
16-bit0.2 GB
8-bit0.1 GB
4-bit0.1 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Questions About qwen3.5-4l-vocab40k-en-ko-headless

How much GPU memory does qwen3.5-4l-vocab40k-en-ko-headless need?

About 0.3 GB at 16-bit and 0.1 GB at 4-bit: the weights (121M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run qwen3.5-4l-vocab40k-en-ko-headless on?

At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.

Can I use qwen3.5-4l-vocab40k-en-ko-headless commercially?

Yes. qwen3.5-4l-vocab40k-en-ko-headless is released under Apache License 2.0. The Apache License 2.0 is a permissive open-source license. It permits commercial use, modification and redistribution. It requires keeping the license and copyright notices and any NOTICE file, stating significant changes, and it includes an express patent grant from contributors.

What is qwen3.5-4l-vocab40k-en-ko-headless's context length?

262,144 tokens, from the maximum position embeddings in its published configuration.

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