HR / People Ops

Employee Onboarding Assistant AI Architecture

Compare RAG, fine-tuning, long-context, and hybrid approaches for employee onboarding assistant at 5K queries/month.

Top approaches

#1 Best fit
Long-Context

Low volume and modest corpus make long-context the simplest option.

#2 Runner-up
RAG

Better once corpus exceeds 200 documents or HR policies change weekly.

#3 Alternative
Fine-Tuning

Only if brand voice consistency is a top priority.

Cost at typical volume

Estimated at 5K queries/month

Long-Context$101/mo
RAG$201/mo
Fine-Tuning$296/mo
Hybrid / RAFT$379/mo

Key considerations

  • 1New hires ask the same questions — use prompt caching on your onboarding handbook for major cost savings.
  • 2Role-specific content should be filtered — not all employees see all policies.
  • 3Evaluate whether long-context is sufficient before investing in vector infrastructure.

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