AION
Research paperTraining & Scaling · Reinforcement Learning1 source · Oct 6, 2026

UP-MOPD: Update Projection in Multi-Teacher On-Policy Distillation

To address this gap, we propose Update Projection for Multi-Teacher On-Policy Distillation (UP-MOPD).

Key points

  • On-policy distillation from multiple teachers combines expertise from different domains in a single student, but conflicting gradients can hinder this integration.
  • Gradient corrections directly constrain parameter updates under plain SGD.
  • UP-MOPD lets the original mixed gradient update the optimizer state and generate a candidate displacement, then projects only violating candidates before they are committed to the parameters.
  • In experiments combining medical and general domains, UP-MOPD improves IFEval-loose accuracy late in training by 2.96 points over vanilla M-OPD.

Sources (1)

  • [1]UP-MOPD: Update Projection in Multi-Teacher On-Policy Distillation
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 6, 02:13 PM
    To address this gap, we propose Update Projection for Multi-Teacher On-Policy Distillation (UP-MOPD).
    On-policy distillation from multiple teachers combines expertise from different domains in a single student, but conflicting gradients can hinder this integration.

Extractive summary: sentences quoted from the sources.