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Model I/O

The core element of any language model application is...the model. LangChain gives you the building blocks to interface with any language model.

model_io_diagram

Conceptual Guide​

A conceptual explanation of messages, prompts, LLMs vs ChatModels, and output parsers. You should read this before getting started.

Quick Start​

Covers the basics of getting started working with different types of models. You should walk through [this section] if you want to get an overview of the functionality.

Prompts​

This section deep dives into the different types of prompt templates and how to use them.

LLMs​

This section covers functionality related to the LLM class. This is a type of model that takes a text string as input and returns a text string.

ChatModels​

This section covers functionality related to the ChatModel class. This is a type of model that takes a list of messages as input and returns a message.

Output Parsers​

Output parsers are responsible for transforming the output of LLMs and ChatModels into more structured data. This section covers the different types of output parsers.