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Model2Vec can be used in a variety of downstream libraries. This document provides examples of how to use Model2Vec in some of these libraries.

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Sentence Transformers

Model2Vec can be used directly in Sentence Transformers: The following code snippet shows how to load a Model2Vec model into a Sentence Transformer model: 
from sentence_transformers import SentenceTransformer

# Load a Model2Vec model from the Hub
model = SentenceTransformer("minishlab/potion-base-8M")
# Make embeddings
embeddings = model.encode(["It's dangerous to go alone!", "It's a secret to everybody."])
The following code snippet shows how to distill a model directly into a Sentence Transformer model: 
from sentence_transformers import SentenceTransformer
from sentence_transformers.models import StaticEmbedding

static_embedding = StaticEmbedding.from_distillation("BAAI/bge-base-en-v1.5", device="cpu", pca_dims=256)
model = SentenceTransformer(modules=[static_embedding])
embeddings = model.encode(["It's dangerous to go alone!", "It's a secret to everybody."])
For more documentation, please refer to the Sentence Transformers documentation.

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LangChain

Model2Vec can be used in LangChain using the langchain-community package. For more information, see the LangChain Model2Vec docs. The following code snippet shows how to use Model2Vec in LangChain after installing the langchain-community package with pip install langchain-community: 
from langchain_community.embeddings import Model2vecEmbeddings
from langchain_community.vectorstores import FAISS
from langchain.schema import Document

# Initialize a Model2Vec embedder
embedder = Model2vecEmbeddings("minishlab/potion-base-8M")

# Create some example texts
texts = [
    "Enduring Stew",
    "Hearty Elixir",
    "Mighty Mushroom Risotto",
    "Spicy Meat Skewer",
    "Fruit Salad",
]

# Embed the texts
embeddings = embedder.embed_documents(texts)

# Or, create a vector store and query it
documents = [Document(page_content=text) for text in texts]
vector_store = FAISS.from_documents(documents, embedder)
query = "Risotto"
query_vector = embedder.embed_query(query)
retrieved_docs = vector_store.similarity_search_by_vector(query_vector, k=1)

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Txtai

Model2Vec can be used in txtai for text embeddings, nearest-neighbors search, and any of the other functionalities that txtai offers. The following code snippet shows how to use Model2Vec in txtai after installing the txtai package (including the vectors dependency) with pip install txtai[vectors]: 
from txtai import Embeddings

# Load a model2vec model
embeddings = Embeddings(path="minishlab/potion-base-8M", method="model2vec", backend="numpy")

# Create some example texts
texts = ["Enduring Stew", "Hearty Elixir", "Mighty Mushroom Risotto", "Spicy Meat Skewer", "Chilly Fruit Salad"]

# Create embeddings for downstream tasks
vectors = embeddings.batchtransform(texts)

# Or create a nearest-neighbors index and search it
embeddings.index(texts)
result = embeddings.search("Risotto", 1)

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Chonkie

Model2Vec is the default model for semantic chunking in Chonkie. To use Model2Vec for semantic chunking in Chonkie, simply install Chonkie with pip install chonkie[semantic] and use one of the potion models in the SemanticChunker class. The following code snippet shows how to use Model2Vec in Chonkie: 
from chonkie import SDPMChunker

# Create some example text to chunk
text = "It's dangerous to go alone! Take this sword."

# Initialize the SemanticChunker with a potion model
chunker = SDPMChunker(
    embedding_model="minishlab/potion-base-8M",
    similarity_threshold=0.3
)

# Chunk the text
chunks = chunker.chunk(text)

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BERTopic

Model2Vec can be used as an embedding model in BERTopic. The following snippet shows how to use Model2Vec in BERTopic: 
from bertopic import BERTopic
from model2vec import StaticModel

embedding_model = StaticModel.from_pretrained("minishlab/potion-base-8M")

topic_model = BERTopic(embedding_model=embedding_model)

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KeyBert

Model2Vec can be used as an embedding model in KeyBert. The following snippet shows how to use Model2Vec in KeyBert: 
from keybert import KeyBERT
from model2vec import StaticModel

embedding_model = StaticModel.from_pretrained("minishlab/potion-base-8M")
kw_model = KeyBERT(embedding_model)

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Weaviate

The Model2Vec Weaviate documentation can be found here.

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Milvus

The Model2Vec Milvus documentation can be found here

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Transformers.js

To use a Model2Vec model in transformers.js, the following code snippet can be used as a starting point: 
import { AutoModel, AutoTokenizer, Tensor } from '@huggingface/transformers';

const modelName = 'minishlab/potion-base-8M';

const modelConfig = {
    config: { model_type: 'model2vec' },
    dtype: 'fp32',
    revision: 'refs/pr/1'
};
const tokenizerConfig = {
    revision: 'refs/pr/2'
};

const model = await AutoModel.from_pretrained(modelName, modelConfig);
const tokenizer = await AutoTokenizer.from_pretrained(modelName, tokenizerConfig);

const texts = ['hello', 'hello world'];
const { input_ids } = await tokenizer(texts, { add_special_tokens: false, return_tensor: false });

const cumsum = arr => arr.reduce((acc, num, i) => [...acc, num + (acc[i - 1] || 0)], []);
const offsets = [0, ...cumsum(input_ids.slice(0, -1).map(x => x.length))];

const flattened_input_ids = input_ids.flat();
const modelInputs = {
    input_ids: new Tensor('int64', flattened_input_ids, [flattened_input_ids.length]),
    offsets: new Tensor('int64', offsets, [offsets.length])
};

const { embeddings } = await model(modelInputs);
console.log(embeddings.tolist()); // output matches python version
Note that this requires that the Model2Vec has a model.onnx file and several required tokenizers file. To generate these for a model that does not have them yet, the following code snippet can be used: 
python scripts/export_to_onnx.py --model_path <path-to-a-model2vec-model> --save_path "<path-to-save-the-onnx-model>"
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