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AI & Machine Learning · Intermediate

Grid Search

Hyperparameter tuning that exhaustively tries every combination from predefined value lists.

Definition

Grid search is simple and reproducible but its cost grows exponentially with the number of hyperparameters. It wastes trials on unimportant dimensions, which is why random search is often more efficient.

Exam tip

Grid search is the most expensive tuning option; rarely the best answer for many hyperparameters.

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