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LLM Model Migration and Version Changes Interview Questions

What to do when the model behind your product changes: why a better model can still be a bad migration, planning for a deprecation, and what to tell users when behaviour shifts.

  • 22 questions with model answers
  • 2 intermediate · 20 advanced

Intermediate LLM Model Migration and Version Changes Questions

  1. What should you tell users when model behaviour changes underneath them?Artifact critique
  2. What role does the golden set play in a migration decision?Concept

Advanced LLM Model Migration and Version Changes Questions

  1. Your provider deprecates the model behind your main feature in 60 days. Write the plan.Case
  2. How do you test a replacement model against the behaviour users have come to expect?Case
  3. Explain why a strictly better model can still be a bad migration.Concept
  4. Describe a dual-running strategy for a model migration.Concept
  5. How do you handle customers who tuned their prompts to the old model?Case
  6. What contractual commitments should you avoid making about model behaviour?Concept
  7. Design the regression suite you would run before any model swap.Artifact critique
  8. How long should you keep the old model available after migrating?Concept
  9. Explain the migration risk specific to a fine-tuned model.Concept
  10. What is the cost profile of running two models in parallel during a migration?Calculation
  11. How would you migrate when the new model has a different context window?Case
  12. Describe how you would detect subtle behaviour drift after a migration.Case
  13. What is your policy for pinning versus automatically adopting the latest model?Concept
  14. How do you communicate a migration to enterprise customers with change-control processes?Case
  15. Critique a migration plan that relies only on benchmark comparisons.Artifact critique
  16. What should you build now so that the next migration is cheaper?Concept
  17. Explain the tradeoff between an abstraction layer and using provider-specific features.Concept
  18. How do you handle a migration that improves most cases and regresses a critical one?Case
  19. Describe the rollback plan for a migration that has already shipped.Case
  20. Walk me through a model migration you would run for a product I name.Interview

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