LAB 5|Hybrid Ratio Tuning

Tune the Alpha

The α parameter decides how much each search method contributes to the final score. Move the slider and watch every result recalculate in real time — with the math shown for each one.

Pure BM25 (0.0)Balanced (0.5)Pure Vector (1.0)

0.00.250.50.751.0

0.50

Balanced

Giving 50% weight to semantic meaning, 50% to exact keywords

Weight Mixer

BM25

50%

keyword weight

Vector

50%

semantic weight

hybrid = 0.50 × vector + 0.50 × bm25

Preset queries — each works best at a different α: