Backfilling it further is definitely in the cards, I just want to stabilize the methodology first.
If a comment just mentions Opus without being more specific and in the absence of relevant context clues, it gets mapped to Opus Latest. So it's saying more about the model family than a specific version. Tbh I'll probably remove all "-latest" data points going forward, as I mentioned in another comment.
Consider keeping this data point but instead calling it something like "Opus Unspecified". Let the user decide how to interpret it.