Model Architecture · Established · Advanced

Spherical Linear Interpolation Merging

Also known as: SLERP Merging, Model Fusion

A mathematical technique used to combine two fine-tuned checkpoint weights by interpolating along a spherical vector trajectory.

What Spherical Linear Interpolation Merging is

SLERP preserves directional information and non-linear feature representations better than simple weighted linear averaging.

How it works

Normalizes model weight vectors, computes the angle between them, and interpolates weights along the geometric arc.

Why it matters

Popularized in the open-source community for creating high-performing merged foundation models without retraining.

Common uses