Why AI Evaluation is the New Unit Testing

In the early days of software engineering, unit testing was seen as a luxury. Today, it is a non-negotiable standard. We are seeing a similar shift in the world of Generative AI.

When you build an LLM-powered feature, you are dealing with probabilistic outputs. Traditional unit tests—where input A always results in output B—don't work here. You need Evaluation.

The Problem with 'Vibes' Based Testing

Many teams still rely on "vibes"—checking a few prompts manually and concluding it's "good enough." This doesn't scale. A single model update or a slight change in the prompt can break everything without you knowing it.

EvidentlyAEO was built to solve this. By measuring AI visibility and response quality at scale, we bring the rigor of unit testing to the frontier of AI.