# AI features and your own keys

> Search by meaning, automatic descriptions and tags, and adding a key of your own.

Page: https://docs.memex.tools/ai-features

**Settings › AI features** has two parts.

![AI features, with Search and Descriptions and tags](https://docs.memex.tools/images/ai-features.jpg)

## Search

**Search** prepares notes so search can find them by meaning.

> **Self-hosted memex**
>
> **Search** chooses a search model: one on the server itself, with no key and no cost, or OpenAI on your own key. Nothing has a daily limit. See [Search model](https://docs.memex.tools/self-hosted-search-model).

## Descriptions and tags

**Descriptions and tags** writes a summary and tags for a note you save on the website without them. What an assistant writes, it describes itself.

## Your own key

**Add personal key** adds a key from OpenAI, Anthropic or Google. The provider bills you for what it does.

## Related

- [Search by meaning misses a new note](https://docs.memex.tools/search-misses-new-note): A note you just approved can take a few minutes to show up in search by meaning.
- [Settings](https://docs.memex.tools/settings): What each Settings pane holds.