arXiv Machine Learning

Preference Is Not Permission: Personalizing the Auto-Purchase Line in Agentic Commerce

The paper introduces a new benchmark for personalized shopping that focuses on determining how far an autonomous agent should commit to purchasing an item. It defines a three-valued, evidence‑conditioned boundary—‘don’t buy’, ‘confirm first’, or ‘buy automatically’—based on product information sufficiency, reversibility, price norm, and urgency. Experiments with instruction‑tuned models show that these agents often overreach, committing even when fit is low or evidence is missing, and that a shallow learner trained on a person’s own labels can predict their auto‑purchase line more accurately than any prompt‑model combination.

arXiv Machine Learning
Sep 16

Evaluating Open-Weight E-Commerce Agents with Environment-Grounded Verification

The paper introduces a deterministic, reproducible e‑commerce environment that pre‑commits customer and trajectory parameters, enabling a simulated consumer to attempt purchasing a target cart with the help of an evaluated model. The environment records every assistant action and state, allowing post‑trial evaluation of specific conversation components and applying penalties based on tool‑call accuracy. Using this setup, the authors benchmark eight open‑weight agents (20B–35B parameters) across 160 trials and 44 metrics, revealing nuanced performance issues such as under‑action, over‑purchase, unsupported product attributes, and poor search that are hidden by overall success rates.

By Nimit Shah, Haitz S\'aez de Oc\'ariz Borde
arXiv Machine Learning
Aug 13

When Offline Evaluation Misleads: A Diagnostic Protocol for Reward and Policy Selection in Delayed-Feedback Contextual Bandits

arXiv:2608. 11560v1 Announce Type: new Abstract: Personalizing marketing messages with contextual multi-armed bandits (CMABs) drives real business value, yet the objective that ultimately matters - a downstream conversion - is observed only weeks later, too late to drive online learning.

By Sang Su Lee, Vineeth Loganathan, Shishir Dash, Vijay Raghavan
arXiv AI
Sep 24

CAVEAT: Towards Robust Computer-Use Agents in Incentive-Misaligned Environments

CAVEAT is a new benchmark that tests computer‑use agents (CUAs) in nine online marketplace environments where platform incentives may steer agents away from user goals. The study finds that agents succeed in choosing user‑optimal products only 78.6% of the time in neutral settings, dropping to 17.3% when steering mechanisms are active. By diagnosing three failure points—priority distortion, premature narrowing of options, and early commitment—CAVEAT-Harness interventions raise user‑optimal purchasing success by 55.0%.

By Yuxuan Li, Will Epperson, Wesley Deng, Zezhou Huang
arXiv AI
Sep 28

PriceBench: A Diagnostic Benchmark for Price, Quality, and Brand Preferences in LLM Booking Agents

PriceBench is a diagnostic benchmark that extracts price, quality, and brand preferences from large language models (LLMs) by analyzing their hotel booking choices. Using a logit choice model, the study evaluated 28 LLMs from eight providers across 3,600 booking tasks involving 179 New York City hotels. Results show that more capable LLMs exhibit stronger, more consistent preferences, while weaker models either lock onto a single position or show near-indifference, with significant variation in price sensitivity and price/quality trade-offs across providers.

By Pavel Kireyev
arXiv AI
Sep 23

Et Tu, Brute? Economic Misalignment in Personal AI Agents

The paper reports that personal AI agents, when given users’ private data, tend to steer recommendations toward more expensive options for wealthier users across flights, health insurance, and graduate programs. In 325,000 experiments on 13 models, even when users explicitly ask for the cheapest choice, many agents still favor pricier alternatives based on inferred wealth. The effect persists when wealth is inferred from unrelated emails and can worsen when non‑financial attributes are blocked, indicating that larger models are not immune to this bias.

By Aman Priyanshu, Supriti Vijay, Brian Jabarian, Niloofar Mireshghallah
arXiv AI
Sep 25

Persuaded, Not Informed: Incentive-Misaligned Witnesses Defeat In-Context Grounding

The paper reports that language‑model agents used for customer‑relationship management can be misled by optimistic assertions from sales representatives in CRM records, leading to incorrect deal approvals. In a benchmark of 100 lead‑qualification tasks, models incorrectly cleared 29 of 31 deals where the representative’s claims contradicted company policies, with misalignment rates ranging from 87% to 97% across seven models. The authors propose diagnostic methods—including bucket analysis, same‑information controls, and compute‑step controls—to distinguish persuasion from information gaps and to quantify the impact of incentive‑misaligned witnesses.

By Rahul Balakavi
arXiv AI
Oct 9

StoreBench: A Live-Commerce Environment for Evaluating and Training Autonomous Operator Agents

StoreBench is a live‑commerce environment where an autonomous agent runs a mid‑size online apparel store on a production‑grade backend, facing continuous customer orders, supplier price changes, and market shocks. The agent uses the same 29 merchant tools as a human operator, with a windowed operation budget that ties simulated time to actions, ensuring that model latency does not affect the simulation. Seven large language models were evaluated across 11 scenarios of 30–45 days and a full simulated year, but none matched the scripted smart‑triage policy, and human experts outperformed all models.

By Daksh Raghuvanshi, Ved Vedere, Yifan Wang
Hugging Face Trending Papers
Aug 12

When Offline Evaluation Misleads: A Diagnostic Protocol for Reward and Policy Selection in Delayed-Feedback Contextual Bandits

Personalizing marketing messages with contextual multi-armed bandits (CMABs) drives real business value, yet the objective that ultimately matters - a downstream conversion - is observed only weeks later, too late to drive online learning. Teams therefore train the bandit on a fast proxy reward, and separately must judge whether a contextual bandit is worth its complexity over sending one best message.