Your provider updated the model behind the API and nobody told you. How do you find out before your users do?
Migrating models is a project you plan. Being migrated is a Tuesday. When the weights move under a stable API and your prompts were tuned against the old ones, every dashboard stays green while quality quietly rots.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
Migrating models is a project you plan. Being migrated is a Tuesday. When the weights move under a stable API and your prompts were tuned against the old ones, every dashboard stays green while quality quietly rots.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
