"Libre" is an alternative word to "free" used by the free software movement with the goal of distinguishing between things that have a price of 0 and things that do not impose arbitrary restrictions on the user.
So, "libre" is used to refer to things that are "free" in the sense that they respect your freedom as defined by the free software foundation.
Only open source software is ever considered libre by the fsf, therefore, neither chatgpt nor character.ai are in fact libre, as the language models behind those systems have not been published.
No amount of "jailbreaking" or avoiding filters can fix this: you will never be able to run these models on your own terms or modify them in any way.
If you care for libre artificial intelligence you should instead follow the efforts of the people behind stable diffusion, a text-to-image model that has actually been released openly so you can run it on your own computer (if you have a good video-card). It's still not perfectly libre, but at least it's open source.