'Hallucinations Are the New Bugs': Engineers Say Model Fabrications Are Now Rare Enough to File as Defects
A framing gaining traction among practitioners marks a shift in how the industry treats reliability: hallucinations have moved from an accepted cost of doing business to an anomaly worth a ticket.
For most of the generative-AI era, hallucination was treated as tax — an inescapable byproduct of probabilistic systems that you designed around, warned users about, and never fully eliminated. That framing is now under revision. "As an engineer working on AI, it's crazy watching hallucinations go from necessary evil to being so rare it's considered a bug if we find an instance of it happening," wrote @nthnluu. The remark is small, but it captures a genuine shift in how builders inside AI companies talk about their systems.
The distinction matters because it changes the workflow. If hallucination is a background condition, you mitigate it — retrieval augmentation, disclaimers, human review. If it's a bug, you file it, reproduce it, root-cause it, and regress-test against it. That is a fundamentally different engineering posture, and it implies a level of baseline reliability that would have sounded implausible even a year ago.
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