The Interaction Tax: When Communication Erases Diversity in Multi-Agent Teams

Does multi-agent LLM interaction help or hurt?

Does multi-agent LLM interaction help or hurt? Some work reports gains from debate (Du et al., 2024), critique loops (Chen et al., 2025), and mixture-of-agents synthesis (Wang et al., 2025), while other work finds that interaction adds cost without improving quality under equal…