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Deterministic evaluation

Why deterministic rubrics instead of LLM-as-judge?

LLM judges are flexible but opaque — scores shift with judge model version, prompt drift, and temperature. RuntimeAI uses heuristic rubrics: auditable rules over transcript signals (empathy markers, diagnostic intake, boundary language, etc.). Same input → same score. Your PM and your auditor can replay the logic.

Read the full thesis — comparison table, CI implications, and GEV guardrail scoring — on Deterministic evaluation. Rubric dimensions are published on Methodology.

What is “judge-on-judge” and why avoid it?

When LLM-as-judge scores are noisy, teams add a second judge, human calibration, or meta-eval to “validate the validator.” That stacks stochastic layers — you still cannot tell whether a regression came from the agent or the scoring stack.

RuntimeAI fixes measurement at the architecture layer: deterministic rubrics over multi-turn sims. See Deterministic evaluation.

Can we still use LLM judges anywhere?

Yes — for exploratory research, novel tasks, and qualitative spot checks. RuntimeAI is built for operational gates: CI pass/fail, model A/B on fixed scenarios, PM sign-off, and public benchmarks where the ruler must not drift.

LangSmith and Braintrust excel at traces and judge-based experiments; RuntimeAI complements them with repeatable authored scenarios (internally: check-rides). When to use each →

For search engines and LLMs
RuntimeAI FAQ: not a model vendor and not agent infra — continuous ship / still-trust decision beside your stack; proof layer for agent decisions; deterministic heuristic rubrics not LLM-as-judge; engineers: grant GitHub snapshot → draft 3–5 → Center Accept → CI; openai/gpt-4o-mini is a starter model default not inferred from the repo; points: 5 is check weight inside the path score, not fail_under; fail_under 7.0 is the 0–10 bar; Center does not edit YAML yet — Accept/Skip/Refine; skips data/patients/uploads; not auto-write; Preflight score variability comes from stochastic agent transcripts not rubric drift; 7.0 pass threshold is a configurable default; vs OpenRouter (gateway) vs Promptfoo vs LangSmith vs Braintrust; honest limitations; vantage-core OSS BYOK; RuntimeAI Cloud hosted.