
The Multi-Agent Trap: When Adding More AI Agents Makes Everything Worse
Multi-agent AI is the default architecture recommendation in 2026. But Google’s 180-configuration study found it degrades sequential task performance by 39-70%, coordination overhead accounts for 37% of all failures, and reliability compounds downward with every agent you add. Klarna’s single agent replaced 700 humans and saved $60 million before complexity caught up. This post covers the data behind the multi-agent trap and when a single agent is the smarter choice.








