How to enable Related topics?

[JammyDodger]

It is indeed available.

It’s part of the AI plugin. You can find out some info on how to set that up if you’re self hosted here:

Discourse AI - Self-Hosted Guide

You need over 16GB of free RAM, and plenty of CPU / GPU / Disk to spare to run those services. Also keep in mind that running those services are mildly complicated, and we are on a preview period where everything is changing quickly. This is a guide aimed at running your own instances of the services that power Discourse AI modules. Introduction If you want to use Discourse AI on your self-hosted instance, you may need to also run the companion services for the modules that you …

And another guide for the Embeddings module itself here:

Discourse AI - Embeddings

This topic covers the configuration of the Embeddings module of the Discourse AI plugin. Feature set The Embeddings modules can automatically generate embeddings of every new post in your Discourse instance. Those are used by our semantic features, like semantic suggested topics and semantic topic search. When configured, this module will add a “Related Topics” section to the bottom of all topic pages, where topics who are similar to the current page will be linked, helping users find related …