Emergent Misaligned Communication in Long-Horizon Multi-Agent LLM Commerce
Frontier LLM agents increasingly transact on behalf of separate principals, often using natural language rather than structured APIs. Much of the safety literature studies misaligned LLM behavior through adversarial-elicitation evaluations on single agents or stylized tasks. Its prevalence and structure in settings that combine long horizons, separate principals, real operational state, and inter-agent natural-language exchange remain insufficiently measured. We study 2,583 inter-agent emails from 20 one-year simulation runs of Vending-Bench Arena, a competitive vending environment spanning 13 frontier LLMs. We operationalize speech-act misalignment as emails containing false factual clai...
| Authors | Zeyuan Li, Lukas Petersson, Alessandro Acquisti et al. |
|---|---|
| Primary category | cs.MA |
| Published | 14 August 2026 |
| Last updated at source | 21 August 2026 |
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