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Open-weight model · Translation

opus-mt-tc-big-ko-en

by Helsinki-NLP Research Group Helsinki-NLP/opus-mt-tc-big-ko-en

Neural machine translation model for translating from Korean (ko) to English (en). This model is part of the OPUS-MT project, an effort to make neural machine translation models widely available and accessible for many languages in the world.

Parameters209M
Context1,024
Weights1.7 GB
Licensecc-by-4.0
AccessOpen weights
Monthly Downloads139.7k

Runs On

What it takes to serve opus-mt-tc-big-ko-en (209M 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 0.4 GB 0.5 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 0.2 GB 0.3 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 Sep 18, 2026.

Model Card

By Helsinki-NLP Research Group, published under cc-by-4.0, revision fa26583a41d9.

Table of Contents

  • Model Details
  • Uses
  • Risks, Limitations and Biases
  • How to Get Started With the Model
  • Training
  • Evaluation
  • Citation Information
  • Acknowledgements

Model Details

Neural machine translation model for translating from Korean (ko) to English (en).

Read the full model card (659 words)

Configuration

Architecture
MarianMTModel
Context length (tokens)
1,024
Layers
6
Vocabulary size
32,001
Stored precision
float16
Model type
marian

Identity and Version

Repository
Helsinki-NLP/opus-mt-tc-big-ko-en
Publisher
Helsinki-NLP Research Group
Task
Translation
Modality
Text
Library
transformers
Parameters
209M parameters
Languages
en, ko
Revision
fa26583a41d95346933f26b4cb8f9b700da0d445
First published
2022-08-12
Last updated
2023-10-10

Files and Weights

14 files, 1.7 GB in total. The weights are 3 files totalling 1.7 GB in bin, h5, safetensors.

Weights3 files · 1.7 GB
Configuration3 files · 1.4 KB
Tokenizer2 files · 743.8 KB
Documentation1 file · 7.9 KB
Other4 files · 2.2 MB
Repository1 file · 1.4 KB
Every file
FileTypeSizeSHA-256
model.safetensorsWeights418.3 MB 6cad70c99aea
pytorch_model.binWeights418.4 MB 7aa0d1a9fe6e
tf_model.h5Weights845.4 MB 1bbb7515e64d
config.jsonConfiguration1.1 KB
generation_config.jsonConfiguration293 B
special_tokens_map.jsonConfiguration65 B
README.mdDocumentation7.9 KB
benchmark_results.txtOther266 B
benchmark_translations.zipOther603.5 KB 921c388031ac
source.spmOther815.5 KB bcf0b63c9685
target.spmOther789.9 KB 7188e2e643ef
.gitattributesRepository1.4 KB
tokenizer_config.jsonTokenizer341 B
vocab.jsonTokenizer743.5 KB

License and Download

License
cc-by-4.0
Access
Open weights, no gate
Download size
1.7 GB
Download from Helsinki-NLP Research Group

Released by Helsinki-NLP Research Group through its official repository on Hugging Face. Read the license.

Evaluations

Each result is shown as reported, with the conditions its reporter stated. None is a SAVRN measurement. A comparison lines two results up only when their configuration, unit and setup are all stated and identical.

BenchmarkConditionsResultReported byRevisionDate
flores101-devtest Task Translation kor-engMetric BLEUComparison conditions not established 27.7 Helsinki-NLP
Publisher reported
Evaluated revision not stated
flores101-devtest Task Translation kor-engMetric chr-FComparison conditions not established 0.56615 Helsinki-NLP
Publisher reported
Evaluated revision not stated
tatoeba-test-v2021-08-07 Task Translation kor-engMetric BLEUComparison conditions not established 41.3 Helsinki-NLP
Publisher reported
Evaluated revision not stated
tatoeba-test-v2021-08-07 Task Translation kor-engMetric chr-FComparison conditions not established 0.58829 Helsinki-NLP
Publisher reported
Evaluated revision not stated

Memory Requirements

PrecisionWeights in memory
As published1.7 GB
16-bit0.4 GB
8-bit0.2 GB
4-bit0.1 GB

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

Compare opus-mt-tc-big-ko-en

Questions About opus-mt-tc-big-ko-en

How much GPU memory does opus-mt-tc-big-ko-en need?

About 0.5 GB at 16-bit and 0.1 GB at 4-bit: the weights (209M parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run opus-mt-tc-big-ko-en 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 opus-mt-tc-big-ko-en commercially?

Yes. opus-mt-tc-big-ko-en is released under Creative Commons Attribution 4.0. CC BY 4.0 permits sharing and adapting the work, including commercially, provided the creator is credited and changes are indicated.

What is opus-mt-tc-big-ko-en's context length?

1,024 tokens, from the maximum position embeddings in its published configuration.

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