RAG evaluation is harder than building the pipeline, Reddit user says
nighthawk2906 · reddit · 2026-07-29
A Reddit post argues that evaluation is often harder than building the RAG system itself.
- The author says retrieval and LLM integration were straightforward, but evaluation became the bottleneck.
- Traditional metrics like BLEU and ROUGE feel useless for open-ended answers, while LLM-as-judge approaches can be biased.
- They are manually reviewing about 50 answers a day and ask what tools or processes others use for RAG evaluation when ground truth is fuzzy.
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