Intro to LLM App Development: Chat, Assistants, Automation

AI Navigate Original / 5/16/2026

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Key Points

  • LLM app difficulty is designing for uncertain output, not calling the model
  • Architecture: input → prompt build → model call → post-processing
  • Decide use, model (cost/latency/terms), and failure behavior first
  • Don't trust output; validate at boundaries; measure cost/latency early

Intro to LLM App Development

Grasp the basic structure of apps embedding LLMs (chat, assistants, automation). The difficulty isn't "calling the model" but designing on the premise of uncertain output.

Typical Architecture

  1. Input: user input + context (history, data)
  2. Prompt construction: system instruction + context + user input

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