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Open-weight model · Translation

ChindaMT-4B

by iApp Technology iapp/ChindaMT-4B

ChindaMT-4B is an open-weight model for translation from iApp Technology, released under Apache License 2.0. It has 5.2B parameters and a 262,144-token context. At 16-bit it needs about 12.4 GB of GPU memory, which fits on 1x MI300X from $1.85 an hour, at the lowest prices in the SAVRN Index. It draws 71 downloads a month.

Paper: Reference-Grounded Data Curation for Instruction-Following Thai-English Machine Translation, AACL-IJCNLP 2026 Main Conference ChindaMT-4B is an open-weight Thai-English machine translation model fine-tuned from Qwen/Qwen3.5-4B on Grounded, a…

Parameters5.2B
Context262,144
Weights10.4 GB
Licenseapache-2.0
AccessOpen weights
Monthly Downloads71

Runs On

What it takes to serve ChindaMT-4B (5.2B 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 10.3 GB 12.4 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 5.2 GB 6.2 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 2.6 GB 3.1 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.

ChindaMT-4B on every accelerator the SAVRN Index prices, at every precision

Model Card

By iApp Technology, published under apache-2.0, revision 8c1a44cd82e5.

Paper: Reference-Grounded Data Curation for Instruction-Following Thai-English Machine Translation, AACL-IJCNLP 2026 Main Conference

ChindaMT-4B is an open-weight Thai-English machine translation model fine-tuned from Qwen/Qwen3.5-4B on Grounded, a 1.97M-record dataset built by Reference-Grounded Data Curation (RGDC). It translates in both directions and follows auxiliary rules given in the prompt, such as terminology, register, length, and output format. It is one of three sizes in the ChindaMT family (4B, 2B, 0.8B).

  • Task: Thai-English machine translation with instruction following
  • Base model: Qwen3.5-4B
  • Parameters: 4B
  • License: Apache-2.0 (inherits the base-model license)

Prompting

Plain translation. Same template for both directions; swap the language line and the source tag:

Translate English to Thai.

EN: The weather is nice today.
Translate Thai to English.

TH: วันนี้อากาศดีมาก

With rules. Add a Rules: block between the language line and the source line. Rules are free-form text:

Read the full model card (949 words)

Configuration

Architecture
Qwen3_5ForConditionalGeneration
Context length (tokens)
262,144
Layers
32
Hidden size
2,560
Feed-forward size
9,216
Attention heads
16
Key/value heads
4
Head dimension
256
Vocabulary size
248,320
Model type
qwen3_5

Identity and Version

Repository
iapp/ChindaMT-4B
Publisher
iApp Technology
Task
Translation
Modality
Text
Library
transformers
Parameters
5.2B parameters
Languages
en, th
Revision
8c1a44cd82e595c027326c121a0548d94169d944
First published
2026-04-23
Last updated
2026-09-29

Files and Weights

10 files, 10.4 GB in total. The weights are 1 file totalling 10.4 GB in safetensors.

Weights1 file · 10.4 GB
Configuration3 files · 4.4 KB
Tokenizer2 files · 20.0 MB
Documentation1 file · 8.3 KB
Other2 files · 943.7 KB
Repository1 file · 1.6 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights10.4 GB c53667291ea7
config.jsonConfiguration2.9 KB —
generation_config.jsonConfiguration163 B —
processor_config.jsonConfiguration1.3 KB —
README.mdDocumentation8.3 KB —
assets/banner.pngOther935.9 KB 8350328b300a
chat_template.jinjaOther7.8 KB —
.gitattributesRepository1.6 KB —
tokenizer.jsonTokenizer20.0 MB 87a7830d63fc
tokenizer_config.jsonTokenizer1.2 KB —

License and Download

License
apache-2.0
Access
Open weights, no gate
Download size
10.4 GB
Download from iApp Technology

Released by iApp Technology through its official repository on Hugging Face. Read the license.

Built From

  • Derived from Qwen/Qwen3.5-4B
  • Described by arXiv:2609.34770
  • Trained on (disclosed) iapp/ChindaMT-Grounded

Memory Requirements

PrecisionWeights in memory
As published10.4 GB
16-bit10.3 GB
8-bit5.2 GB
4-bit2.6 GB

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

Questions About ChindaMT-4B

How much GPU memory does ChindaMT-4B need?

About 12.4 GB at 16-bit and 3.1 GB at 4-bit: the weights (5.2B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run ChindaMT-4B 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 ChindaMT-4B commercially?

Yes. ChindaMT-4B 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 ChindaMT-4B's context length?

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

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