Dat Ngo

Telemetry, Not Code, Audits Nondeterministic AI Agents

Dat Ngo of Arize argues that LLM observability has to account for failures in execution paths, not just broken components, because agents can call tools in different orders, branch, loop, and change behavior across runs. In his account, traces become the audit record for nondeterministic systems, while evaluation must combine model judges, human feedback, golden datasets, deterministic checks, and business metrics at the right scope. Arize’s stated direction is to connect observability, evals, experimentation, and improvement into an increasingly automated loop.