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

# Model Master

> Configure the providers and models your agents run on.

The **Model Master** is where you connect model providers and define the models your
agents and prompts run against.

## Providers and models

* A **Provider** is a vendor account (OpenAI, Anthropic, Google, and more) holding
  your API key and defaults.
* A **Model** references a provider and carries per-model settings plus cost metadata.

## Managed tiers or your own key

The built-in **Viorant** provider offers **Medium** and **Low** tiers that need no key
and draw from your [credit wallet](/providers/credits).

With your own key, models run **directly from your machine** — the key is stored in your
OS credential store, never sent to Viorant, and these runs cost no credits. See
[Bring your own key](/providers/byok) for the full flow and the list of supported
providers.

## Cost readout

Models carry per-token cost metadata, so test runs show an estimated cost as you go.

<Note>
  Screenshots and a full walkthrough of adding a provider and model are being added
  to this page.
</Note>