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How do you evaluate generative output quality (text and images) when there's no single correct answer?

For open-ended generation there's no ground-truth string to match, so accuracy is meaningless. The field uses a layered mix of automatic, model-based, and human metrics. Here is how to assemble a credible eval.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

For open-ended generation there's no ground-truth string to match, so accuracy is meaningless. The field uses a layered mix of automatic, model-based, and human metrics. Here is how to assemble a credible eval.

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