How do you A/B test prompts in a production system?

How do you A/B test prompts in a production system?hard

Type: conceptual
Topic: do-you-a-b-test-prompts-in-a-production-system
Frequency: common
Tags: mlops, how, you, test, prompts, production

Answer

Route traffic: X% to prompt A, (100-X)% to prompt B via feature flags or a routing layer.

Explanation

Route traffic: X% to prompt A, (100-X)% to prompt B via feature flags or a routing layer. Log all inputs/outputs with variant tag. After N samples, compare metrics (exact match, LLM-judge score, latency, cost). Use statistical significance tests before declaring a winner. Run shadow mode first: both prompts execute, only A is served, compare offline.

Follow-upCan you give a production example?