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#artificial intelligence Preprint Oct 2026

Before They Can Solve: Predicting Post-Training Coding-Agent Performance from Base Models

How can we predict which base checkpoint is worth an expensive round of agentic post-training? End-to-end pass@$K$ tests whether successful behavior already appears in a base model's distribution, but it is a poor fit for agentic coding: many base checkpoints cannot reliably produce the well-formed tool invocation requ...

Tan Yu, A. Bukharin, Khushi Bhardwaj et al. · 1 citation

HIVE: Hidden-Evidence Verification for Hallucination Detection in Diffusion Large Language Models

HIVE, which compresses trajectory hidden states, selects informative step-layer evidence, and conditions a verifier through continuous prefix embeddings to produce a hallucination score and structured diagnostics, outperforms eight established baselines and a verifier-backbone-matched text-only control in all six setti...

Guoshenghui Zhao, Wei-Jie Zhao, Tan Yu · 1 citation
#natural language process... Preprint Sep 2026

LOCKR: A Hidden-State Trajectory-Guided Planner for Detecting and Repairing Stable-but-Wrong Lock-In in Diffusion Language Models

Hidden diffusion trajectories are established as actionable signals for selective test-time reasoning repair and LOCKR, a hidden-state trajectory-guided planner that decides when to allocate additional computation, expands a structured set of targeted repair branches, and selects the most promising continuation using t...

Guoshenghui Zhao, Tan Yu, Wei-Jie Zhao · 0 citations

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