r/MachineLearning July 22, 2026 · Communities

One encoder, seven heads: what we learned training a unified security classifier with masked losses [P]

We spent the last months consolidating seven separate sequence classifiers into one multi-head model, our apex model, so to speak, and since the weights are now public, I wanted to share what worked and what surprised us. Setup: a shared mmBERT-small encoder with seven task heads, binary injection (BCE), document class