What's Hardest to Test in LLM Apps? Developers Discuss Pitfalls Beyond the Model
Financial_Ad_7297 · reddit · 2026-08-16
Reddit discussion: the hardest part of testing LLM applications is often not the model itself but surrounding components: prompt changes can fix one set of queries and hurt another, retrieval looks better but produces worse answers, tool-calling decisions are unpredictable, and real-user interactions reveal new issues. Traditional testing methods struggle. Asks community: which failure modes are hardest to test reliably?
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