On that note, have there been any chatgpt like open-source projects, that are on the same or similar level?

As others have pointed out, running a truly large language model like GPT-3 isn't (yet) feasible on your own hardware - you need a LOT of powerful GPUs racked up in order to run inference.

https://github.com/bigscience-workshop/petals is a really interesting project here: it works a bit like bittorrent, allowing you to join a larger network of people who share time on their GPUs, enabling execution of models that can't fit on a single member's hardware.