Confusion matrix for alerts derived from ELAsTiCC labeled sample #34–#37 (not included in training). Alerts were classified as either “AGN” (recurrent, extragalactic transients), “Stellar” (galactic transients) or “SN-like”. The SN-like subset encompass nonrecurrent extragalactic transients from the SN, Long and Fast taxonomy groups. The μlens subset is shown separately, as the SNGuess classifier was developed without including this subset. The SNGuess classifier does an excellent job of distinguishing SN and Stellar events. The conservative approach can be seen in that a substantial fraction of all AGN and almost all μlens events are tagged as SN-like when first detected.