I traced 2,500 listing checks with Weights & Biases Weave, removed avoidable model work one change at a time, and scored every version against the same answers.

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My AI detectors flagged many genuine reviews, and filtering them made the sentiment model less accurate.

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A real Weave project that regression-tests three OpenAI models against the exact reply format your app depends on.

The post One Capital Letter Was Silently Breaking My AI Support Bot, and It Wasn't in the New Model appeared first on Towards Data Science.