What is an Article 53(1)(d) training-data summary?

Public summary of training content · Article 53(1)(d), Regulation (EU) 2024/1689

The EU AI Act requires every provider of a general-purpose AI (GPAI) model placed on the EU market to "draw up and make publicly available a sufficiently detailed summary about the content used for training" — Article 53(1)(d) of Regulation (EU) 2024/1689. It is the first legal instrument anywhere that forces AI companies to disclose, publicly, what their models were trained on.

What the summary must contain

The European Commission published a mandatory template in July 2025 (originally C(2025) 5235, reissued in formal adoption as C(2025) 8311 final — every version archived here). A compliant summary identifies the model and provider, then discloses — per modality — the main data sources. The accompanying Explanatory Notice sets the level of detail; it also directs providers to update the summary when further training materially changes the picture — at least every six months where such updates are required — while the model is on the market.

The template's three sections

1. General information — provider and model identification, modalities, overall size of the training data, and the market-placement date.
2. List of data sources — per category: public and licensed datasets, data scraped by the provider (with crawler names, collection periods, and respect for robots.txt and TDM rights reservations), user data, and synthetic data.
3. Data-processing aspects — how illegal content was removed and how opt-outs and rights reservations were honored.

Where to read the published summaries

The publication-status table lists every tracked model; each links its archive of captured versions — for example Meta Muse Spark (a summary that has already changed between versions) or Fastweb MIIA.

Who must publish, and when

Every GPAI provider, EU-based or not, whose model is placed on the EU market. The obligation applies since 2 August 2025 for models placed on the market from that date; models already on the market before then have until 2 August 2027. See the deadlines page for the full timeline.

What happens if a provider doesn't comply

The AI Office can demand information and compel compliance; fines for GPAI obligations can reach €15 million or 3% of worldwide annual turnover, whichever is higher (Article 101). Enforcement powers apply from 2 August 2026.

Why an archive is needed

Providers publish these summaries on their own websites — behind changing URLs, rotating tokens, consent walls, and silent edits. There is no official registry, no version history, and no guarantee yesterday's summary still says what it said. The GPAI Ledger archives every version of every summary it can find, daily, with cryptographic proof of what was published when — so researchers, journalists, rights holders and compliance teams can cite the record rather than a link that may die.

Read the sources

Regulation (EU) 2024/1689 (EUR-Lex) · Commission GPAI policy page (template & guidance) · AIAL's quality grades

Last reviewed: 2026-08-21 . This page summarizes the law for orientation; it is not legal advice.