I don't know and I'm really Interested in the answer.

I heard a rumor that Luna is a slightly different architecture from Sol and Terra, which makes me wonder if Luna and Astra might be more related to each other than to Sol and Terra.

Bit of a big leap to make from a token count though!

I just checked the tiktoken library and couldn't see any changes relating to Luna: https://github.com/openai/tiktoken