LLM Regression Testing Guide: Preventing Quality Degradation in Production
A practical framework for building automated LLM regression testing suites to catch model drift, prompt change regressions, and formatting breakages before deploying to production.
A practical framework for building automated LLM regression testing suites to catch model drift, prompt change regressions, and formatting breakages before deploying to production.
Updating a system prompt or upgrading model versions (e.g. GPT-4o to Gemini 2.5) frequently fixes one edge case while silently breaking 5 existing prompt capabilities or structured JSON outputs in production.
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