RAG-006RAG · Staying truthfullayaeval.Groundedness

Groundedness

Is each sentence in the answer backed by the sources?

Simulation state:

When it passes

Every line traces back.

Threshold satisfied: evaluation score >= 3.0.

When it fails

One line has no source.

Violation detected: execution flagged for human review or fallback routing.

SDK Specification

Parameter	Value	Description
Class	Groundedness	Python evaluator class in layaeval
Required Fields	"retrieved_context", "response"	Arguments expected in the call signature
Default Threshold	>= 3.0	Passes when quality score is at or above this value
Category	RAG Evaluation	Staying truthful (Does every line come from the pages, with nothing made up?)

Python Example

pip install layaeval

groundedness.py

1from layaeval import Groundedness
2
3metric = Groundedness(threshold=3.0)  # passes at or above 3.0
4
5res = metric(
6    retrieved_context="Paris is the capital of France, with 2.1M residents.",
7    response="Paris is the capital of France.",
8)
9
10print(res.passed, res.value, res.confidence)