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 ..?
user
This is not yet clear currently because the language model has to be trained first and then everything will be optimized. 

The unoptimized version of Open Assistant will probably require at the start a high-end graphics card in the 4090 range with 24 GB of RAM.
assistant
For the unoptimized version of Open Assistant what CPU is recommended.
user
This is not yet clear currently because the language model has to be trained first and then everything will be optimized.

It is likely that the unoptimized version of Open Assistant would require a high-end CPU with many cores so more work can be done simultaneously.
assistant