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Open Source Model Profile · Helsinki-NLP

opus-mt-cs-en

opus-mt-cs-en is a Helsinki-NLP Marian model translating Czech to English. The model card documents transformer-align preprocessing and BLEU results.

Publisher
Helsinki-NLP
Task
translation
Model type
marian
License
apache-2.0
Library
transformers
Publication status
Accepted · not indexed

Model overview

opus-mt-cs-en is published by Helsinki-NLP as a Marian translation model from Czech to English. The captured configuration identifies MarianMTModel with model type marian under Apache-2.0. According to the model card, it uses a transformer-align setup trained on OPUS data with normalization and SentencePiece preprocessing.

Recorded capabilities

Czech-to-English pair

According to the model card, the source language is cs and the target language is en.

Transformer-align with SentencePiece

The model card describes a transformer-align model with normalization and SentencePiece preprocessing.

Reported BLEU and chr-F table

According to the model card, benchmarks are listed across newstest2014 through newstest2018 and Tatoeba with BLEU and chr-F values.

Use cases in the source record

  • Czech-to-English translation workflows using a Marian text-to-text translation model.

Limitations and unknowns

  • No parameter count was extracted from this record.
  • No training hardware, context window, or quantization detail was extracted.
  • Provider state is historical snapshot data, not independently refreshed current availability.
  • Benchmark figures come from the publisher model card and were not independently verified by Ethen.

Source and provenance

Source: Helsinki-NLP/opus-mt-cs-en

Captured: Unknown. Processed: 2026-09-07T19:34:31.256840+00:00.

opus-mt-cs-en source languages: cs target languages: en OPUS readme: cs-en dataset: opus model: transformer-align pre-processing: normalization + SentencePiece download original weights: opus-2019-12-18.zip test set translations: opus-2019-12-18.test.txt test set scores: opus-2019-12-18.eval.txt Benchmarks testset BLEU chr-F newstest2014-csen.cs.en 34.1 0.612 newstest2015-encs.cs.en 30.4 0.565 newstest2016-encs.cs.en 31.8 0.584 newstest2017-encs.cs.en 28.7 0.556 newstest2018-encs.cs.en 30.3 0.566 Tatoeba.cs.en 58.0 0.721

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