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

# Introduction

Semantic Router is a superfast decision-making layer for LLMs and agents. Instead of waiting for slow LLM generations to make tool-use decisions, it uses semantic vector space to route requests based on meaning.

## What is Semantic Router?

Semantic Router enables:

* **Faster decisions**: Make routing decisions in milliseconds rather than seconds
* **Lower costs**: Avoid expensive LLM inference for simple routing tasks
* **Better control**: Direct conversations, queries, and agent actions with precision
* **Full flexibility**: Use cloud APIs or run everything locally

## Key Features

* **Simple API**: Set up routes with just a few lines of code
* **Dynamic routes**: Generate parameters and trigger function calls
* **Multiple integrations**: Works with Cohere, OpenAI, Hugging Face, FastEmbed, and more
* **Vector store support**: Integrates with Pinecone and Qdrant for persistence
* **Multi-modal capabilities**: Route based on image content, not just text
* **Local execution**: Run entirely on your machine with no API dependencies

## Version 0.1 Released

Semantic Router v0.1 is now available! If you're migrating from an earlier version, please see our [migration guide](../user-guide/guides/migration-to-v1).

## Getting Started

For a quick introduction to using Semantic Router, check out our [quickstart guide](quickstart).

## Execution Options

Semantic Router supports multiple execution modes:

* **Cloud-based**: Using OpenAI, Cohere, or other API-based embeddings
* **Hybrid**: Combining local embeddings with API-based LLMs
* **Fully local**: Run everything on your machine with models like Llama and Mistral

## Resources

* [Documentation](https://docs.aurelio.ai/semantic-router/index.html)
* [GitHub Repository](https://github.com/aurelio-labs/semantic-router)
* [Online Course](https://www.aurelio.ai/course/semantic-router)