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*   [Model I/O](/v0.1/docs/modules/model_io/)
*   Chat Models

On this page

Chat Models
===========

ChatModels are a core component of LangChain.

LangChain does not serve its own ChatModels, but rather provides a standard interface for interacting with many different models. To be specific, this interface is one that takes as input a list of messages and returns a message.

There are lots of model providers (OpenAI, Cohere, Hugging Face, etc) - the `ChatModel` class is designed to provide a standard interface for all of them.

[Quick Start](/v0.1/docs/modules/model_io/chat/quick_start/)[​](#quick-start "Direct link to quick-start")
----------------------------------------------------------------------------------------------------------

Check out [this quick start](/v0.1/docs/modules/model_io/chat/quick_start/) to get an overview of working with ChatModels, including all the different methods they expose

[Integrations](/v0.1/docs/integrations/chat/)[​](#integrations "Direct link to integrations")
---------------------------------------------------------------------------------------------

For a full list of all LLM integrations that LangChain provides, please go to the [Integrations page](/v0.1/docs/integrations/chat/)

How-To Guides[​](#how-to-guides "Direct link to How-To Guides")
---------------------------------------------------------------

We have several how-to guides for more advanced usage of LLMs. This includes:

*   [How to cache ChatModel responses](/v0.1/docs/modules/model_io/chat/caching/)
*   [How to stream responses from a ChatModel](/v0.1/docs/modules/model_io/chat/streaming/)
*   [How to do function calling](/v0.1/docs/modules/model_io/chat/function_calling/)

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