I think it's more likely a compound sigmoid (don't Google that). LLMs are composed of distinct technologies working together. As we've reached the inflection point of the scaling for one, we've pivoted implementations to get back on track. Notably, context windows are no longer an issue. But the most recent pivot came just this week, allowing for a huge jump in performance. There are more promising stepping stones coming into view. Is the exponential curve just a series of sigmoids stacked too close together? In any case, the article's correct - just adding more compute to the same exact implementation hasn't enabled scaling exponentially.