Standard benchmarks fall short for multi-turn AI agents. A new approach is the 'job interview eval,' where an agent is given an underspecified problem. It is then graded not just on the solution, but on its ability to ask clarifying questions and handle changing requirements, mimicking how a human developer is evaluated.

Standard benchmarks are misleading for practical use. A model that benchmarks well can fail at agentic tasks. When selecting an open-source model, prioritize its documented ability to call tools and follow multi-step instructions, as this is crucial for building useful agents.

Treating AI evaluation like a final exam is a mistake. For critical enterprise systems, evaluations should be embedded at every step of an agent's workflow (e.g., after planning, before action). This is akin to unit testing in classic software development and is essential for building trustworthy, production-ready agents.

Evaluating agentic AI requires an end-to-end "whole system eval" that assesses every connection, tool, and potential failure point. This is crucial because the non-deterministic nature of these systems creates a compounding effect of uncertainty that can't be captured by only checking the final LLM output.

The non-deterministic nature of agentic AI makes traditional pass/fail testing insufficient. Businesses must adopt a multi-dimensional scorecard for every interaction, evaluating metrics like compliance, factual accuracy, latency, and intent recognition, not just task completion.

Building a functional AI agent is just the starting point. The real work lies in developing a set of evaluations ("evals") to test if the agent consistently behaves as expected. Without quantifying failures and successes against a standard, you're just guessing, not iteratively improving the agent's performance.

OpenAI identifies agent evaluation as a key challenge. While they can currently grade an entire task's trace, the real difficulty lies in evaluating and optimizing the individual steps within a long, complex agentic workflow. This is a work-in-progress area critical for building reliable, production-grade agents.

An agent's effectiveness is limited by its ability to validate its own output. By building in rigorous, continuous validation—using linters, tests, and even visual QA via browser dev tools—the agent follows a 'measure twice, cut once' principle, leading to much higher quality results than agents that simply generate and iterate.

Traditional evals fall short for sophisticated agents. A more effective method is a built-in evaluation loop where one agent is tasked with grading the output of another. This allows for continuous, automated quality assessment, especially when done in separate context windows to avoid bias.