Compound AI Systems
An architectural approach that builds AI applications using multiple interconnected models, deterministic tools, and external memory.
“The future of AI is not a bigger brain in a jar; it is a highly coordinated assembly line of specialized cognitive tools.”
Relying on a single, massive frontier model for all tasks is economically ruinous and architecturally fragile. It leads to high latency, exorbitant costs, and a single point of failure. Compound AI Systems allow organizations to optimize for cost, speed, and accuracy simultaneously. By breaking down complex tasks into specialized, deterministic workflows guided by smaller, purpose-built models, architects can build highly resilient applications that do not depend entirely on the shifting capabilities of one vendor's API.
Richard Ewing’s Research Thesis
Do not worship the model. Engineer the system. The orchestration of components is more valuable than the parameter count.
Why This Specification Exists
Single frontier models are too slow, expensive, and fragile for complex enterprise applications.
Building simple wrapper apps around one large LLM.
Monolithic models fail at deterministic routing and specialized sub-tasks.
Orchestrating specialized small models, vector databases, and deterministic state machines.
What Changes If You Believe This?
Architecture shifts to dynamic routing and component orchestration.
Massive reduction in API costs by routing simple queries to small models.
Lower latency improves user experience.
Reduced dependency on a single external vendor API.
Recommended Action by Role
Decompose monolithic prompts into discrete, testable nodes.
Latest Publications & Research Activity
Salesforce and SAP are putting AI agents inside your workflows. Who tells them no?
How to Prevent Memory Loss in AI Applications
Giving an AI a bigger memory window is like giving a confused worker a bigger inbox.
Frequently Asked Questions
Q:Why not just use the biggest model for everything?
It is incredibly slow and expensive. It is like using a supercomputer to calculate a tip.
Inspectable Evidence Ledger
Classified evidence items supporting, extending, or refining this canonical research specification.
Recommended Citation
Ewing, R. (2026). "Compound AI Systems." Richard Ewing Research Canon. Available at: https://www.richardewing.io/concepts/compound-ai-systems
@article{ewing_compound_ai_systems,
author = {Ewing, Richard},
title = {Compound AI Systems},
journal = {Richard Ewing Research Canon},
year = {2026},
url = {https://www.richardewing.io/concepts/compound-ai-systems}
}