> ## Documentation Index
> Fetch the complete documentation index at: https://docs.x6.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> Unified LLM gateway — one API key, every model, transparent billing.

# About us

[**x6.ai**](https://x6.ai/) is a one-stop large-scale model access network provided by x6.ai.

Developers only need one API key to call all mainstream AI models through a unified x6.ai endpoint, including:

* OpenAI Channel (GPT series)
* Anthropic Channel (Claude series)
* GCP Vertex (Gemini series)
* Default
* Default
* And more models

x6.ai automatically implements:

* Unified Interface Format
* Automatic routing to the target provider
* Multi-model invocation and transparent billing
* Token-level Credits Tracking
* Secure API Key Management

x6.ai supports two protocol interface formats:

* Models accessed via the OpenAI-compatible API
* Models accessed via the Anthropic API

On the client side, your application only needs to communicate with x6.ai, instead of managing integrations with multiple vendor APIs.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.