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

# Concepts

> Key concepts in Gatelit — providers, models, auth schemes, and prompts.

## Providers and models

Models are referenced as `provider/model-id` — for example `openai/gpt-4o` or `anthropic/claude-3-5-sonnet-20241022`. The gateway knows how to talk to each provider, so you use the same endpoint and auth regardless of which model you pick.

## Auth schemes

Three schemes cover the full range of use cases. See [Authentication](/gateway/authentication) for the full guide.

## Prompts

Prompts are versioned templates stored in the dashboard. They define a model, system message, and variable placeholders. You run them by ID via `/v1/prompts/:id/run`, passing just the variable values. This separates prompt content from application code.

## Org model settings

Each organisation can enable or disable specific models. The gateway checks the org's settings before routing a request. Platform defaults come from the built-in model catalog — no DB lookup required at runtime.