Model reference · open weights

LaBSE

Embeddings sentence-transformers Embeddings 1 build Open weights 761k dl/mo

LaBSE is an open-weight embedding model from sentence-transformers. LaBSE (FP32) weighs 942 MB; the smallest configuration that runs it is RTX 3060 12 GB.

  • LaBSE is a multilingual sentence-similarity model developed by sentence-transformers that maps 109 languages to a shared vector space.
  • It features 471M parameters, a context length of 512 tokens, and is distributed under the apache-2.0 licence.

Summary of the sentence-transformers/LaBSE model card, 2026-10-01

What it is

Released bysentence-transformers
Released2022-03-02
Parameters471M
VRAM942 MB for the weights

What it runs on

Memory and cards for LaBSE (FP32)

942 MBweights, file size
1.1 GBruntime overhead
CardRunsMemory
RTX 3060 12 GBfits11.6 GB
RTX 4060 Ti 16 GBfits15.4 GB
RTX 3090 24 GBfits23.4 GB
RTX 4090 24 GBfits23.4 GB
RTX 5090 32 GBfits31.0 GB
L40S 48 GBfits44.0 GB
A100 80 GBfits78.2 GB
H100 80 GBfits78.1 GB
RTX PRO 6000 Blackwell 96 GBfits93.8 GB
DGX Spark (GB10) 128 GB unifiedfits107 GB
H200 141 GBfits138 GB
B200 180 GBfits176 GB

From the model card

What sentence-transformers says about LaBSE

Read the model card

This is a port of the LaBSE model to PyTorch. It can be used to map 109 languages to a shared vector space.

Usage (Sentence-Transformers)

Using this model becomes easy when you have sentence-transformers installed:

pip install -U sentence-transformers

Then you can use the model like this:

from sentence_transformers import SentenceTransformer
sentences = ["This is an example sentence", "Each sentence is converted"]

model = SentenceTransformer('sentence-transformers/LaBSE')
embeddings = model.encode(sentences)
print(embeddings)

Full Model Architecture

SentenceTransformer(
  (0): Transformer({'max_seq_length': 256, 'do_lower_case': False}) with Transformer model: BertModel
  (1): Pooling({'word_embedding_dimension': 768, 'pooling_mode_cls_token': True, 'pooling_mode_mean_tokens': False, 'pooling_mode_max_tokens': False, 'pooling_mode_mean_sqrt_len_tokens': False})
  (2): Dense({'in_features': 768, 'out_features': 768, 'bias': True, 'activation_function': 'torch.nn.modules.activation.Tanh'})
  (3): Normalize()
)

Citing & Authors

Have a look at LaBSE for the respective publication that describes LaBSE.

Quoted from the model card on Hugging Face. The full card is behind the Hugging Face link above.

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