Observability
Helicone Evals
Run deterministic evaluations against your LLM pipelines using Helicone's eval framework. Catch regressions, measure quality, and ship with confidence.
What are Helicone Evals?
Evals are programmatic assertions that run against your LLM responses. They let you define quality gates — factual accuracy, tone compliance, format adherence — and execute them automatically on every request flowing through Helicone's proxy.
Deterministic
Same input always yields same pass/fail result
Low Latency
Sub-50ms eval execution, inline with your request pipeline
Custom Logic
Write evals in TypeScript, Python, or use built-in templates
Why use evals with Meridian?
- ▸Validate that your license-key generation responses follow the exact JSON schema your loader expects
- ▸Ensure error messages never leak internal paths, stack traces, or server identifiers
- ▸Monitor response quality drift when switching between GPT-4o, Claude, or self-hosted models
- ▸Gate production deployments — block a release if eval pass rate drops below 98%
Ready to add evals to your pipeline?
Start with Helicone's free tier — no credit card required.
Get Started on Helicone