Andreas opted out on June 29th[0]. As discussed elsewhere on HN[1]

[0] https://mathstodon.xyz/@andreasthom/117240535270608201

[1] https://news.ycombinator.com/item?id=49638353

Then none of his work after June 29 will be included in the training data.

What I was referring to is the fact that neither Levent Alpöge nor Tristan Buckmaster will answer this question.