嵌入

¥Embeddings

嵌入模型 创建一段文本的矢量表示。

¥Embedding models create a vector representation of a piece of text.

本页面记录了与各种模型提供商的集成，这些集成允许你在 LangChain 中使用嵌入。

¥This page documents integrations with various model providers that allow you to use embeddings in LangChain.

Pick your embedding model:

OpenAI

Install dependencies

npm

npm i @langchain/openai

yarn

yarn add @langchain/openai

pnpm

pnpm add @langchain/openai

OPENAI_API_KEY=your-api-key

import { OpenAIEmbeddings } from "@langchain/openai";

const embeddings = new OpenAIEmbeddings({
  model: "text-embedding-3-large"
});

Azure

Install dependencies

npm

npm i @langchain/openai

yarn

yarn add @langchain/openai

pnpm

pnpm add @langchain/openai

AZURE_OPENAI_API_INSTANCE_NAME=<YOUR_INSTANCE_NAME>
AZURE_OPENAI_API_KEY=<YOUR_KEY>
AZURE_OPENAI_API_VERSION="2024-02-01"

import { AzureOpenAIEmbeddings } from "@langchain/openai";

const embeddings = new AzureOpenAIEmbeddings({
  azureOpenAIApiEmbeddingsDeploymentName: "text-embedding-ada-002"
});

AWS

Install dependencies

npm

npm i @langchain/aws

yarn

yarn add @langchain/aws

pnpm

pnpm add @langchain/aws

BEDROCK_AWS_REGION=your-region

import { BedrockEmbeddings } from "@langchain/aws";

const embeddings = new BedrockEmbeddings({
  model: "amazon.titan-embed-text-v1"
});

VertexAI

Install dependencies

npm

npm i @langchain/google-vertexai

yarn

yarn add @langchain/google-vertexai

pnpm

pnpm add @langchain/google-vertexai

GOOGLE_APPLICATION_CREDENTIALS=credentials.json

import { VertexAIEmbeddings } from "@langchain/google-vertexai";

const embeddings = new VertexAIEmbeddings({
  model: "text-embedding-004"
});

MistralAI

Install dependencies

npm

npm i @langchain/mistralai

yarn

yarn add @langchain/mistralai

pnpm

pnpm add @langchain/mistralai

MISTRAL_API_KEY=your-api-key

import { MistralAIEmbeddings } from "@langchain/mistralai";

const embeddings = new MistralAIEmbeddings({
  model: "mistral-embed"
});

Cohere

Install dependencies

npm

npm i @langchain/cohere

yarn

yarn add @langchain/cohere

pnpm

pnpm add @langchain/cohere

COHERE_API_KEY=your-api-key

import { CohereEmbeddings } from "@langchain/cohere";

const embeddings = new CohereEmbeddings({
  model: "embed-english-v3.0"
});

await embeddings.embedQuery("Hello, world!");

Name	Description
阿里巴巴统一	alibaba-tongyi}
百度千帆	baidu-qianfan}
DeepInfra	deepinfra-embeddings}
Gradient AI	gradient-ai}
HuggingFace 推断	huggingface-inference}
Jina	jina-embeddings}
Llama CPP	llama-cpp}
Minimax	minimax}
Mixedbread AI	mixedbread-ai}
Nomic	nomic}
Prem AI	prem-ai}
腾讯混元	tencenthunyuan}
TensorFlow	tensorflow}
HuggingFace Transformers	huggingface-transformers}
Voyage AI	voyage-ai}
ZhipuAI	zhipuai}