Pretty sure Yann is not involved in this - Meta has a separate GenAI group headed up by Ahmad Al-Dahle (@Ahmad_Al_Dahle).

Yann Lecun's name is listed in the model card: https://github.com/meta-llama/llama3/blob/main/MODEL_CARD.md

There's a lot of people on that list!

LeCun is head of FAIR (FaceBook AI Research), which is a different internal organization than the GenAI group responsible for these Llama LLMs.

From the horse's mouth:

"I had some input on our open source policy but I had no direct technical input on Llama-3"

https://x.com/ylecun/status/1781749833981673741