Stop the token bleed: building token-efficient multi-agent systems

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Every engineering team deploying AI agents eventually discovers an uncomfortable truth: the model isn’t the biggest expense. The hidden cost is everything around it: repeated retrievals, duplicate prompts, unnecessary tool calls, oversized context windows, multiple agents reasoning over the same information. Individually, these architectural decisions seem harmless. At production scale, they become a severe tax on latency, infrastructure, and cloud spend.

A proof-of-concept agent that answers 50 questions a day can tolerate inefficiencies. An enterprise platform coordinating thousands of requests per minute cannot.

This article explores practical techniques for engineering token-efficient AI systems without sacrificing output quality. Rather than focusing solely on prompt compression, we will optimize the entire workflow from routing and retrieval to caching and model selection.

Why token optimization is a systems problem

Most discussions around token optimization begin and end with prompt engineering. In practice, architecture drives token consumption.

Consider a typical multi-agent workflow:

User ↓ Intent Agent ↓ Retriever ↓ Research Agent ↓ Planning Agent ↓ Writer Agent ↓ Reviewer Agent ↓ Final Response

At each stage, the system might retrieve the same documents, repeat identical instructions, call the same model, and resend the entire conversation history. By the time a response reaches the user, the architecture has processed tens of thousands of unnecessary tokens.

“Improving efficiency requires redesigning the workflow, not just shortening the …

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