What are the minimum hardware requirements for running and hosting Open Assistant, say just for my personal, offline usage would be? Please specify, e.g. 128 GiB RAM,  Epyc/Ryzen 9 16-core CPU ..?
I am sorry, but that information does not exist as Open Assistant has yet to be released as of February 2023.
sorry, Open Assistant is not being made yet as of February 2023. so, I can't tell, what are the minimum hardware requirements for running and sting Open Assistant.
Are you pretending to be me?