Sure! I'll try to briefly summarize though almost certainly will oversimplify. There are a couple of open source language models trained by Eleuther AI - the first one was called GPT-J, and it used some newer model architecture concepts. Subsequently, they released a model architected in the likeness of GPT-3, called GPT-NeoX-20B. Functionally, it was quite similar architecturally to GPT-J, but just with more parameters. Pythia is a model with the same architecture and the same dataset but with different parameter sizes to test scaling laws.
DollyV2 is a Pythia model fine tuned on the Databricks 15K dataset
DollyV2 is a Pythia model fine tuned on the Databricks 15K dataset