Welcome to Kilosort3, a MATLAB package for spike sorting electrophysiological data up to 1024 channels. In many cases, and especially for Neuropixels probes, the automated output of Kilosort3 requires minimal manual curation. The main change from v2.5 is a completely new and much more sophisticated clustering algorithm, which we will document soon. To learn about Kilosort2.5, the primary reference is the Neuropixels 2.0 paper. The Github wiki still refers to Kilosort2, and it will be updated.