Cascaded Vs Fused Models

Choosing cascaded versus fused voice architecture decides whether you can enforce guardrails, debug failures, and swap in a stronger LLM later. This lays out the tradeoffs across five designs.

• AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
• tool use — A model's ability to call external functions — run code, search the web, edit files — instead of only generating text.
• guardrails — The checks around a model that block bad inputs and outputs — filters, validators, and permission rules the model itself can't override.
• LLM — A large language model — the neural network behind tools like Claude and ChatGPT, trained on huge amounts of text to predict what comes next.

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