# Ground truth

Concept · [Building with AI](https://ecosystem.samcarlton.com/ai)

Also called: gold standard, golden set, golden dataset, source of truth, reference answers

The verified, correct answers or facts that an AI system's output is checked against.

**For example:** A team has accountants label 200 invoices by hand to create ground truth, then measures how often the AI extracts the same totals.

## Connects to (6)

- [Evals](https://ecosystem.samcarlton.com/evals): Tests that check whether the outputs of a model or an AI product meet the criteria its builders set.
- [Data integrity](https://ecosystem.samcarlton.com/data-integrity): Whether data stays accurate, complete and consistent over time.
- [Hallucination](https://ecosystem.samcarlton.com/hallucination): When an AI model states something false or invented as though it were true.
- [Loss function](https://ecosystem.samcarlton.com/loss-function): A formula that scores how wrong a model's output is compared with the right answer.
- [promptfoo](https://ecosystem.samcarlton.com/promptfoo): An open-source tool for testing prompts and AI apps.
- [Braintrust](https://ecosystem.samcarlton.com/braintrust): A platform for evaluating and monitoring AI products.

Map view: https://ecosystem.samcarlton.com/ground-truth