EU AI Act: public summary of training content (Art. 53(1)(d))

Training data transparency

Must AI developers disclose what they trained on?

A summary or on request

General-purpose AI providers must publish a summary of their training content, in a set template

Holding

Providers of general-purpose AI models must make publicly available a sufficiently detailed summary of the content used for training. The Commission's template, published on 24 July 2025, sets a uniform format covering types of content, data sources and collection methods; the duty applies from 2 August 2025, including to open-source models.

The first binding training-data disclosure duty: a structured summary rather than a full list of works.

Sources