Build a Deterministic Mock LLM Provider So Your Eval Suite Runs With No API Keys and No Network
This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.
Every LLM project I have worked on eventually hits the same wall. Your eval suite and your unit tests both want to call a model, and the moment they do, CI slows to a crawl, costs money, needs secret keys, and flakes whenever the vendor changes a checkpoint. The output is nondeterministic by design…
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- 2026-10-21 09:30 · DEV Community — AI
Build a Deterministic Mock LLM Provider So Your Eval Suite Runs With No API Keys and No Network