two-tower

1 free lesson tagged two-tower across AI. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.

intermediate

The two-stage funnel: retrieval then ranking

Every feed has the same impossible job: pick ten items out of millions, in under a tenth of a second. The answer is a funnel. Learn why recommenders split into a cheap retrieval stage and an expensive ranking stage, how two-tower models make retrieval possible, and why nearest-neighbour search is the trick that makes the whole thing fit in a budget.

9 steps·~14 min

The two-stage funnel: retrieval then ranking

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