langchain_md_files/integrations/providers/ai21.mdx

# AI21 Labs

>[AI21 Labs](https://www.ai21.com/about) is a company specializing in Natural 
> Language Processing (NLP), which develops AI systems 
> that can understand and generate natural language.

This page covers how to use the `AI21` ecosystem within `LangChain`.

## Installation and Setup

- Get an AI21 api key and set it as an environment variable (`AI21_API_KEY`)
- Install the Python package:

```bash
pip install langchain-ai21
```

## Chat models

### AI21 Chat 

See a [usage example](/docs/integrations/chat/ai21).

```python
from langchain_ai21 import ChatAI21
```

## Deprecated features

:::caution The following features are deprecated. 
:::

### AI21 LLM

```python
from langchain_ai21 import AI21LLM
```

### AI21 Contextual Answer

```python
from langchain_ai21 import AI21ContextualAnswers
```

### AI21 Embeddings

```python
from langchain_ai21 import AI21Embeddings
```
## Text splitters

### AI21 Semantic Text Splitter

```python
from langchain_ai21 import AI21SemanticTextSplitter
```