PR2 (Mixture-of-experts routing): current frontier — recent, not yet superseded in the knowledge base. 0 paper(s) critique it, 0 beat it on benchmarks — not ranked as a superseded baseline. Sub-problem: cluster led by Mixtral. Newer alternatives in the same sub-problem include PADD, MESA, PR2, RouteHijack, MASCing.

Mixture-of-experts routing

PR2

PR2: Predictive Routing Replay for MoE-Based LLM Reinforcement Learning

On the frontierfirst seen May 29, 2026

Current frontier — recent, not yet superseded in the knowledge base

0 papers critique it · 0 beat it on benchmarks

What to use instead

Recent methods in the same sub-problem, not yet superseded in the knowledge base — arXiv benchmark leaders, not vetted production recommendations.

PADDPADD: Path-Aligned Decompression Distillation for Non-Router Teacher to Guide MoE Student Learning
Jun 9, 2026
MESAMESA: Improving MoE Safety Alignment via Decentralized Expertise
May 30, 2026
PR2PR2: Predictive Routing Replay for MoE-Based LLM Reinforcement Learning
May 29, 2026
RouteHijackRouteHijack: Routing-Aware Attack on Mixture-of-Experts LLMs
May 1, 2026
MASCingMASCing: Configurable Mixture-of-Experts Behavior via Activation Steering Masks
Apr 30, 2026
F-SOURSparse Models, Sparse Safety: Unsafe Routes in Mixture-of-Experts LLMs
Feb 9, 2026
SocialNav-MoESocialNav-MoE: A Mixture-of-Experts Vision Language Model for Socially Compliant Navigation with Reinforcement Fine-Tuning
Dec 15, 2025
OrdMoEOrdMoE: Preference Alignment via Hierarchical Expert Group Ranking in Multimodal Mixture-of-Experts LLMs
Nov 24, 2025
Mix- and MoE-DPOMix- and MoE-DPO: A Variational Inference Approach to Direct Preference Optimization
Oct 9, 2025