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Soumyabrata Pal

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#artificial intelligence Preprint Sep 2026

LLM Judge Validation Under Sparse Overlap: From Inference to Design

It is proved that overlap sparsity is the first-order determinant of wrong deployment decisions: at 5% pairwise overlap, wrong-decision rates reach 25% and the probability of selecting the wrong best judge among ten candidates is 65%.

Jun-Xuan Li, Arko Provo Mukherjee, Soumyabrata Pal · 0 citations
#machine learning Preprint Sep 2026

Online Learning with LLM Experts from Limited Feedback

We study adaptive routing of prompts to large language model (LLM) experts to maximize response quality in an online setting with limited feedback. We formulate it as a bandit problem with $K$ actions that represent experts and $d$ features that encode prompts, over a horizon of $T$ rounds. We propose algorithms that s...

Wei Wang, Soumyabrata Pal, Koyel Mukherjee et al. · 0 citations
Preprint Aug 2026

Instruction Distillation: Text Instructions as Visual Examples

Instruction Distillation is proposed: an offline procedure in which the MLLM itself generates, for each individual training image, a structured identification instruction encoding general appearance cues, features that differentiate the class from visually similar ones, and a common confusion point.

Hardik Jindal, Soumyabrata Pal, Sayak Ray Chowdhury · 0 citations
Review Aug 2026

POOL: Propagated Uncertainty Over Lookalikes

This work instantiate this framework with p, a hybrid estimator that combines verbal confidence with spectral answer diversity computed from the negative von Neumann entropy of sampled answer embeddings, and achieves higher average AUROC than verbal confidence and sampling-based uncertainty while using half as many sam...

Rounak Sharma, Ananya B. Sai, Soumyabrata Pal · 0 citations
Preprint Aug 2026

ThinkRetrieve: Retrieval-Augmented Reasoning Traces for Test-Time Scaling

ThinkRetrieve is proposed, a test-time scaling framework that augments the reasoning traces of LRMs with dynamically retrieved solved examples at each reasoning step, providing the model with guidance on how to reason rather than merely what facts are relevant.

Vaibhav Singh, Soumya Suvra Ghosal, Sarvesh Gharat et al. · 0 citations

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