Mattermost does have an Github Repository with a choice of three licenses: MIT (if using versions compiled by them), AGPLv3 (if compiled by you) or an Enterprise license. I would count that as open source.

A more general business management application like Odoo could work?

I think this plot from the same source makes it even more clear:

Looks like this is reddit, using /r and all.

These models have so many parameters that, while insufficient to memorize all text it has ever seen, it can end up memorizing some of the content. It is the difference between being able to recall a random passage versus recalling the exact thing you need. Both allow you to spill content verbatim, but one is problematic while the other can be helpful.

There are techniques to allow it it ‘read on demand’, but they are not part of the core model (i.e. the autocmpletion model / LLM) and are tacked on top of it. For example, you can tie it search engine, which Microsoft’s copilot does, and is something which I don’t think is enabled for ChatGPT by default. Or allow it to query a external data bank (Retrieval Augmented Generation).

KeepassXC is multiplatform. (Also: KeepassDX is quite nice as an an Android app for Keepass databases.)

There is a difference with adding an instance and accessing it that way (via their API - bypassing the server you signed up on) and via federation using the server you signed up on. Only in the latter case can you vote using the account already registered.

Try using the search feature to access the community via federation (e.g. “!cats@lemmy.world”) rather than adding the instance directly.