Cisco or Arista SW scripting to pull IOS (EOS) version and Model info

Hi

I would like to ask what is the best way to get IOS(EOS) version and model info from Cisco or Arista SW from scripting? The value can be JSON type or some value.. We have jump host and can ssh into all these SWs.

Let's say we want to make some nice inventory feature based on the scripting data from the jump host.