Talk it through with Aurelius
Library›Aurelius›The problem
Aurelius · Work & Leadership
Knowledge + Guidance

Why does my model work in testing but fail in production?

You can make the model answer. That is not the same as making it answer correctly, every time, when you are not watching. You already know this. The gap between a demo and a product is not a technical mystery — it is the habits you have not built yet. Production is different from testing because reality does not read your spec. Users type what you never imagined. Data drifts. The model that worked in June fails in August, quietly, and no one tells you until a customer does. This is not bad luck. It is the predictable result of shipping without watching. So stop searching for a cleverer model or a better prompt. That is comfort, not progress. The work in front of you is plain: find your worst failure, test for it, and build a habit of checking the system daily. Choose that.

◆ How this problem reads on the two dials
GuidanceKnowledge
Coaching
More to learn
1:1 with AureliusWith others (a Pod)
Mostly you & the coach
A little with peers
This needs real knowledge of reliability practice, but the harder part is the discipline to actually do it — so coaching carries nearly half the weight.
How the two dials adapt to you →
What’s really going on

It breaks in production because you tested the model, not the system around it. Reliability is not a trait of the model — it is built from logging, testing for failure, and watching it daily. Stop hunting for a smarter model. Choose the unglamorous work: test the failure you fear most, then watch for it every day.

🔒 What you’ll build togetherUnlock by starting
A moveList every failure the model has produced so far, even the small, embarrassing ones.
A movePick the single failure that would hurt you most, and write a test for it today.
A movePut a human in the loop for one week before you trust any output alone.
A moveLog every input and output for 30 days. You cannot fix what you cannot see.
A moveChoose one number that tells you the system is breaking, and look at it every day.

What changes unlock by starting

  • You find your worst failure before a customer does.
  • You build a habit of checking the system, not just trusting it.
  • You stop blaming the model and start fixing the process around it.
  • You know, within days, when something has gone wrong — not weeks later.

Related problems

One object, two jobs: a public answer to a real problem, and — the moment you start the chat — Aurelius’s live plan for your version of it.