What is
Eval Harness?
A test suite for AI features that measures quality, regressions, and edge cases.
Definition
An eval harness is to AI what a test suite is to code. It contains a set of inputs, expected outputs (or expected qualities), and an automated grading method. The harness runs on every model change, prompt change, retrieval change, or dependency update, so you catch regressions before they reach users. Without an eval harness, AI development is guess-and-check.
Example
A 200-question eval set for a healthcare AI assistant, scored with both LLM-as-judge and human review for high-stakes categories.
How Vedwix uses Eval Harness in client work
We build the eval harness before the AI feature itself. No evals, no engagement.
We ship this.
If you're building with Eval Harness in production, we can help — from architecture review to full implementation.
Brief us