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Prafulla Kumar Choubey

Texas A&M Univeristy

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#artificial intelligence Preprint Sep 2026

Fork Where the Model Changes Its Mind: Belief-Shift Branching for Tree-Structured Reinforcement Learning

This work formalizes fork placement as locating the pivots of the chain's value curve, where the expected outcome turns, and proposes belief-shift branching, which read the model's answer belief at candidate boundaries and fork just before the step where consecutive beliefs diverge most.

Bin Lei, Yu Li, Prafulla Kumar Choubey et al. · 0 citations
Jul 2026

Speculate with Memory: Lossless Acceleration for LLM Agents

Memory-augmented speculation yields a 19--39\% relative accuracy improvement on action prediction and up to a $2.5\times$ increase on observation prediction tasks with repetitive action spaces as memory accumulates and generalize across speculator models of varying cost.

Yu Li, Qinyuan Ye, Prafulla Kumar Choubey et al. · 2 citations · ⚡1
#artificial intelligence Preprint Aug 2026

Redesigning and Auditing Deep Research Writing for Faithful Reports

CLAIMPROBE is introduced, a claim-level audit that decomposes DR reports into claims and measures hallucination, misattribution, citation hygiene, and necessary-fact recall against retrieved evidence and proposes CLAIMWRITER, a hierarchical claim-based writer that extracts source facts, maps them to a query-derived out...

Hiroaki Hayashi, P. Venkit, Prafulla Kumar Choubey et al. · 0 citations

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