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Author

TN ShashiBhushan

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#natural language process... Preprint Sep 2026

Can One Adapted Model Do It All? Fine-Tuning Strategy Selection for Customer Support LLMs

This work studies whether task-specialist models should be handled by separate task-specialist models or by a single model trained through multi-task training, sequential updates, or model merging, and concludes with practical guidelines for selecting fine-tuning strategies in real-world settings.

Md Tahmid Rahman Laskar, Xue-Yong Fu, TN ShashiBhushan · 0 citations
#natural language process... Preprint Sep 2026

When Better Turns Do Not Make Better Agents: Diagnosing the Gap Between Next-Turn Metrics and Workflow Success

It is found that SFT consistently improves text-turn success, and that overall next-turn success increases for every model under gold-history evaluation, but these improvements do not transfer to autonomous workflow execution.

Md Tahmid Rahman Laskar, Xue-Yong Fu, Gundeep Singh et al. · 1 citation · ⚡1
#natural language process... Preprint Sep 2026

SFT or RL for Tool-Calling Agents? A Controlled Study Across Data, Method, and Scale

Limited controlled evidence exists on how training data, adaptation method, and model scale jointly affect tool-calling performance in language-model agents. We evaluate supervised fine-tuning (SFT) with LoRA, reinforcement learning (RL) via Group Relative Policy Optimization (GRPO), and SFT followed by GRPO across six...

Md Tahmid Rahman Laskar, Xue-Yong Fu, TN ShashiBhushan · 0 citations

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