| --- | |
| sidebar_position: 0 | |
| sidebar_class_name: hidden | |
| keywords: [compatibility] | |
| --- | |
| # Chat models | |
| [Chat models](/docs/concepts/#chat-models) are language models that use a sequence of [messages](/docs/concepts/#messages) as inputs and return messages as outputs (as opposed to using plain text). These are generally newer models. | |
| If you'd like to write your own chat model, see [this how-to](/docs/how_to/custom_chat_model/). | |
| If you'd like to contribute an integration, see [Contributing integrations](/docs/contributing/integrations/). | |
| ## Featured Providers | |
| While all these LangChain classes support the indicated advanced feature, you may have | |
| to open the provider-specific documentation to learn which hosted models or backends support | |
| the feature. | |
| import { CategoryTable, IndexTable } from "@theme/FeatureTables"; | |
| <CategoryTable category="chat" /> | |
| ## All chat models | |
| <IndexTable /> |