metadata
language:
- multilingual
language_details: NLLB-200 supports 200 languages (see facebook/nllb-200-distilled-600M)
license: cc-by-nc-4.0
tags:
- translation
- coreml
- nllb
- apple
- ios
- mlpackage
pipeline_tag: translation
datasets:
- flores-200
base_model: facebook/nllb-200-distilled-600M
NLLB-200 Core ML 512 (KV decoders)
Core ML export of facebook/nllb-200-distilled-600M with max sequence length 512 for encoder and decoder.
Layout
| Artifact | Role |
|---|---|
NLLB_Encoder_512.mlpackage |
Encoder |
NLLB_Decoder_512_init.mlpackage |
First autoregressive step + initial KV |
NLLB_Decoder_512_step.mlpackage |
Later steps; past KV in/out |
tokenizer/ |
Hugging Face tokenizer files |
config.json |
Base model config copy |
Do not use a single legacy NLLB_Decoder_512.mlpackage only: greedy decoding breaks when the graph was traced with a fixed short prefix.
The palettized repo (nllb200-coreml-512-pal8) uses the same three mlpackage names with 8-bit weight palettization.
App
on-device iOS client model IDs: nllb200-coreml-512, nllb200-coreml-512-pal8 (NLLBCoreMLTranslationService).
Conversion
Produced from [nllb200_coreml_colab_v3_fixed.ipynb](local iOS project (private)) (same KV pipeline as 1024, enc_len=512).
Validation (macOS)
python3 Scripts/validate_nllb512_bleu_macos.py --local-dir Notebooks/nllb/output/nllb200-coreml-512 --min-bleu 50
License
Same as the base model (CC-BY-NC-4.0) and NLLB-200 terms.