activity
20232026
most citedHelping or Herding? Reward Model Ensembles Mitigate but do not Eliminate Reward Hacking

3 citations · 8 across the 9 of their papers we have counts for

collaborators

11 papers

cs.GT2026

Decentralized LLM Workflows via Sequential Auctions

Ian Gemp, Shubhendu Trivedi, Adam Fisch +7

We present a scalable framework for solving multi-step tasks through a decentralized market of self-interested agents. Prior theoretical work demonstrated that agents organized thr…

cs.LG2026

Your Transformer Is Secretly Elastic

Walter Simoncini, Dheeraj Varghese, Gertjan J. Burghouts +1

Scaling up transformers has produced models with broad capabilities, deployed across heterogeneous hardware and fluctuating workloads. Yet, model families offer only a few fixed si…

cs.LG2026

CollabEval: Statistically Efficient Collaborative Model Evaluation via Matrix Completion

Adam Fisch, Daniel Deutsch, Joshua Maynez +5

Evaluating generative AI models is a routine, but resource-intensive, process that is conducted over and over again during the course of model development. In this work, we propose…

math.ST2026

Multiple-Prediction-Powered Inference

Charlie Cowen-Breen, Alekh Agarwal, Stephen Bates +4

Statistical estimation often involves tradeoffs between expensive, high-quality measurements and a variety of lower-quality proxies. We introduce Multiple-Prediction-Powered Infere…

cs.LG2025

Cost-Optimal Active AI Model Evaluation

Anastasios N. Angelopoulos, Jacob Eisenstein, Jonathan Berant +2

The development lifecycle of generative AI systems requires continual evaluation, data acquisition, and annotation, which is costly in both resources and time. In practice, rapid i…

cs.LG2025

Optimizing Pre-Training Data Mixtures with Mixtures of Data Expert Models

Lior Belenki, Alekh Agarwal, Tianze Shi +1

We propose a method to optimize language model pre-training data mixtures through efficient approximation of the cross-entropy loss corresponding to each candidate mixture via a Mi…

cs.LG2024★ 3 cited

Rewarding Progress: Scaling Automated Process Verifiers for LLM Reasoning

Amrith Setlur, Chirag Nagpal, Adam Fisch +6

A promising approach for improving reasoning in large language models is to use process reward models (PRMs). PRMs provide feedback at each step of a multi-step reasoning trace, po…

cs.LG2024★ 1 cited

Robust Preference Optimization through Reward Model Distillation

Adam Fisch, Jacob Eisenstein, Vicky Zayats +5

Language model (LM) post-training (or alignment) involves maximizing a reward function that is derived from preference annotations. Direct Preference Optimization (DPO) is a popula…

cs.LG2024★ 1 cited

Theoretical guarantees on the best-of-n alignment policy

Ahmad Beirami, Alekh Agarwal, Jonathan Berant +4

A simple and effective method for the inference-time alignment and scaling test-time compute of generative models is best-of- sampling, where samples are drawn from a refere…

cs.LG2023★ 3 cited

Helping or Herding? Reward Model Ensembles Mitigate but do not Eliminate Reward Hacking

Jacob Eisenstein, Chirag Nagpal, Alekh Agarwal +9

Reward models play a key role in aligning language model applications towards human preferences. However, this setup creates an incentive for the language model to exploit errors i…

cs.CV2023

Efficient End-to-End Visual Document Understanding with Rationale Distillation

Wang Zhu, Alekh Agarwal, Mandar Joshi +3

Understanding visually situated language requires interpreting complex layouts of textual and visual elements. Pre-processing tools, such as optical character recognition (OCR), ca…