AI RESEARCH

TERMS-Bench: Diagnosing LLM Negotiation Agents Beyond Deal Rate

arXiv CS.AI

ArXi:2605.13909v1 Announce Type: cross Negotiation is a central mechanism of economic exchange, shaping markets, procurement, labor agreements, and resource allocation. It is also a canonical testbed for agentic language models, requiring multi-turn interaction under hidden preferences, strategic communication, and binding constraints. These properties make negotiation hard to evaluate: unlike math or code, it has no intrinsic verifier. Existing LLM negotiation evaluations rely on LLM-vs.-LLM interaction or aggregate outcomes such as deal rate, leaving failures opaque. We.