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Glossary termPublished inEU AI Act

Validation data (EU AI Act)

What does "Validation data" mean under the EU AI Act?

Data used for providing an evaluation of the trained AI system and for tuning its non-learnable parameters and its learning process in order, inter alia, to prevent underfitting or overfitting

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Last updated: 22 August 2026.

Regulations

  • EU Artificial Intelligence Act (EU AI Act)

    The EU AI Act is Regulation (EU) 2024/1689. On 2 August 2026 its transparency rules and enforcement machinery took effect, but the high-risk regime for credit scoring and life and health insurance pricing did not: Regulation (EU) 2026/1744 moved it to 2 December 2027. Prohibitions have applied since February 2025.

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