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Beyond Two Towers: Launching the 3-Tower Engagement Co-Train Model (Part 2)
Our short summary of Pinterest’s engineering write-up. The full story, with all the detail, is on their blog.
Read the full write-up on medium.com (opens in a new tab)Problem
Ads needed more accurate click predictions without slowing down serving millions of candidates.
Solution
Created a 3‑tower co‑train model that shares embeddings, gives a fast two‑tower score for all ads and a richer three‑tower score for a selected subset, keeping latency low.
Want the architecture, code and numbers? They’re in the original post.
Read the full write-up on medium.com (opens in a new tab)