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Rajat Ghosh

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#artificial intelligence Preprint Sep 2026

GRPO Training Dynamics for Small Language Models

Group Relative Policy Optimization (GRPO) has emerged as a memory-efficient reinforcement fine-tuning (RFT) technique for reasoning-intensive tasks. How- ever, GRPO training dynamics on small language models (SLMs) remain poorly understood, limiting its reliable adoption and reproducibility in open and resource- constr...

Rajat Ghosh, Vaishnavi Bhargava, Henry Wong et al. · 0 citations
Jul 2026

Pluralis v0.1: Towards a Multicultural, Multimodal, Multilingual Benchmark for AI Risk and Reliability

This work introduces Pluralis v0.1, a novel multimodal, multi-regional, and multilingual dataset built from a culture-first perspective and calls upon the research community to utilize this foundation to advance the science of multilingual, multicultural evaluation to better support AI cultural alignment globally.

Alicia Parrish, Rajat C. Shinde, Sanket Badhe et al. · 0 citations
Jul 2026

DeltaServe: Host-Agnostic Co-Serving of Inference and Fine-Tuning for LLMs

DeltaServe is presented, a host-agnostic co-serving design that converts this idle inference capacity into LoRA fine-tuning throughput while preserving inference service-level objectives (SLOs).

Jiaxuan Chen, Jianshu She, Ye Yuan et al. · 1 citation
Preprint Jul 2026

Reduced-Order Models: The Mother of World Models

It is argued that the outstanding obstacle to deploying world models in systems that cannot fail -- power, thermal, process control -- is not predictive fidelity but verifiability, and a research agenda for physics-grounded, verifiable world models is outlined that unifies the two lineages.

Rajat Ghosh · 0 citations

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