Models

Note

Conceptual Guide

This section of the documentation deals with different types of models that are used in LangChain. On this page we will go over the model types at a high level, but we have individual pages for each model type. The pages contain more detailed “how-to” guides for working with that model, as well as a list of different model providers.

• Getting Started: An overview of the models.

Model Types

• LLMs: Large Language Models (LLMs) take a text string as input and return a text string as output.

• Chat Models: Chat Models are usually backed by a language model, but their APIs are more structured. Specifically, these models take a list of Chat Messages as input, and return a Chat Message.

• Text Embedding Models: Text embedding models take text as input and return a list of floats.