> ## Documentation Index
> Fetch the complete documentation index at: https://langchain.idochub.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Featherless AI

[Featherless AI](https://featherless.ai/) is a serverless AI inference platform that offers access to over 4300+ open-source models. Our goal is to make all AI models available for serverless inference. We provide inference via API to a continually expanding library of open-weight models.

# Installation and Setup

`pip install langchain-featherless-ai`

1. Sign up for an account at [Featherless](https://featherless.ai/register)
2. Subscribe to a plan and get your API key from [API Keys](https://featherless.ai/account/api-keys)
3. Set up your API key as an environment variable(`FEATHERLESSAI_API_KEY`)

# Model catalog

Visit our model catalog for an overview of all our models: [https://featherless.ai/models](https://featherless.ai/models)