05/28/2026
As AI moves from experimental "cool feature" to core enterprise infrastructure, one question is dominating C-suite conversations: How do we know we can trust it?
The answer lies in Evals (Evaluations). Think of them as the modern version of Test-Driven Development (TDD) for the age of LLMs. Because models are nondeterministic - meaning the same prompt can yield different results every time - traditional software testing isn't enough. Evals provide the structure needed to turn that unpredictability into a measurable, scalable system.
Designing an effective evaluation isn't just a technical task; it's "human problem engineering." Before writing code, you have to define what "good" looks like for your specific use case. Is it accuracy? Safety? Tone? Compliance?
In practice, this looks like a layered approach. Online Evals act as real-time guardrails, checking AI responses for compliance before they ever reach a customer. Offline Evals review performance trends across thousands of conversations to identify "context rot" or subtle drifts in behavior over time.
A common mistake is confusing Benchmarks with Evals. Benchmarks tell you how a model performs "out of the box" compared to its peers. Evals tell you how your product performs using your specific prompts, your data, and your unique business logic.
For regulated industries like finance and insurance, the margin for error is zero. Moving from a prototype to a production-ready agent requires a data-driven feedback loop. By running A/B tests on prompt versions and tracking metrics over time, teams can iterate with the same discipline used in traditional software engineering.
The "move fast and break things" era of AI is ending. Success now belongs to the organizations that can prove their AI is safe, reliable, and compliant through rigorous, continuous evaluation.
The goal is to ensure your technology supports your growth rather than defining its limits.
Read more in our Blog: https://www.solwey.com/posts/the-role-of-evals-in-better-ai