Risk categories and obligations
Prohibited practice (Art. 5)This use is outright banned in the EU — it cannot be mitigated, only stopped. The highest fines in the regulation.
High risk (Annex III/I)The heaviest set of duties: risk management, data governance, documentation, human oversight, conformity assessment.
GPAI model (Chapter V)A dedicated regime for providers of general-purpose AI models; extra duties for systemic risk (training above 10^25 FLOP).
GPAI in useYou build on a third-party AI model (such as GPT, Claude or Gemini). The GPAI regime targets that model's provider — but you must be able to rely on their compliance (vendor assessment) and, where outputs reach the public, follow the transparency duty (Art. 50). Note: if you substantially modify the model and place it on the market under your own name, you may become a provider yourself.
Transparency (Art. 50)A duty to make AI recognisable: disclose chatbots, mark synthetic output machine-readably, label deepfakes.
AI literacy (Art. 4)Anyone developing or deploying AI must ensure a sufficient level of AI literacy among staff.
Minimal riskMost AI applications fall here; voluntary codes of conduct are encouraged.
Deadlines
Prohibited practice (Art. 5)in force since 2 February 2025
High risk (Annex III/I)Annex III: 2 December 2027 (was 2 August 2026); Annex I products: 2 August 2028 (was 2 August 2027)
GPAI model (Chapter V)in force since 2 August 2025; AI Office enforces from 2 August 2026
GPAI in usethe heavy GPAI duties sit with the model provider; for you, vendor assurance and transparency apply
Transparency (Art. 50)applies from 2 August 2026; only Article 50(2) marking for systems placed on the market before that date applies from 2 December 2026
AI literacy (Art. 4)in force since 2 February 2025
Minimal riskno specific AI Act obligations beyond AI literacy
Full detail, sources and changelog: AI Act deadlines — verified against the source →
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