Dated analysis of EU AI Act enforcement, Commission guidance and deadline changes — what each development actually obliges providers and deployers to do, and by when.
Dated analysis of EU AI Act developments — Commission guidance, enforcement milestones and amendments to the compliance timeline. Each entry states what changed, who it binds, and the deadline that follows from it.
For the standing legal position rather than a specific development, start with the AI Act deadline tracker or the compliance checklist.
Latest analysis
The Marking Reprieve Is Closing: What Providers Are Doing With Their Older Models
8 September 2026 — Generative AI systems already in service before 2 August 2026 must mark their outputs by 2 December. Anthropic is the first provider to date its migration model by model, starting with Claude Opus 5 on 9 September. Where the other providers stand, the difference between the two codes of practice, and what a deployer should demand in writing before the deadline.
AI Watermarking: What's Been Deployed, the Results So Far, and the Consequences
22 August 2026 — SynthID, C2PA and Content Credentials are now deployed at scale by Google, OpenAI, Adobe, Meta and Microsoft. Independent research shows every current watermarking technique can be defeated by a determined actor — what that means for Article 50 compliance and for anyone judging whether content can be trusted.
EU AI Act Enforcement Has Started: What Changed on 2 August 2026
4 August 2026 — The Article 50 transparency obligations became directly applicable and the Commission's AI Office gained the power to fine general-purpose AI providers up to 3% of global turnover. The high-risk regime did not arrive. A grace period on machine-readable marking closes on 2 December 2026, and a new Article 5 prohibition becomes enforceable on the same date.
European Commission Publishes Guidelines on AI Act Transparency Obligations
21 July 2026 — The Commission published guidelines on the Article 50 transparency obligations less than two weeks before they entered into application, clarifying how national market surveillance authorities are expected to interpret the four disclosure duties.
Where to go next
- AI Act deadline tracker — every date, with original and revised deadlines side by side
- Digital Omnibus analysis — what Regulation (EU) 2026/1744 changed
- Transparency obligations (Art. 50) — scope, exemptions, and who owes what
- Penalties — the fine tiers and how they are calculated
- AI Act vs DORA vs NIS2 — overlapping obligations for regulated entities
Official AI Act Compliance Deadline Calendar
Updated · Sources: Regulation (EU) 2024/1689 and the 2026 Digital Omnibus on AI.
| Obligation | Applies to | Original date | New date | Status | Countdown | Legal basis |
|---|---|---|---|---|---|---|
| Prohibited Practices (Art. 5) | All providers and deployers | active | — | AI Act Art. 5 | ||
| GPAI Rules (Chapter 5) | GPAI model providers | active | — | AI Act Art. 51-56 | ||
| Commission Enforcement Powers over GPAI | GPAI model providers | active | — | AI Act Art. 88-94, 101 | ||
| Transparency Obligations (Art. 50) | Providers and deployers of chatbots, generative, emotion recognition systems | active | — | AI Act Art. 50 | ||
| New Art. 5 Prohibition (CSAM / non-consensual intimate imagery) | Providers and deployers of generative AI systems | active | — | AI Omnibus 2026 Art. 5 | ||
| AI-Generated Content Marking (pre-existing systems) | Providers of generative AI systems on the market before 2 Aug 2026 | active | — | AI Act Art. 50(2) — transitional | ||
| Regulatory Sandboxes | National competent authorities | deferred | — | AI Omnibus 2026 Art. 57 | ||
| High-risk AI — Annex III (standalone) | Providers of standalone Annex III systems | deferred | — | AI Omnibus 2026 Art. 6(2) | ||
| High-risk AI — Annex I (embedded) | AI embedded in Annex I regulated products | deferred | — | AI Omnibus 2026 Art. 6(1) |
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AI Act meets DORA and NIS2
Is your organisation subject to both the AI Act and DORA? The two regulations intersect on the operational resilience of financial AI systems. Our sister site regulation-dora.eu covers DORA in depth — including what the AI Act adds on top of an existing DORA programme.
The AI Act for financial institutions ↗ Explore regulation-dora.eu ↗Frequently Asked Questions
Each entry is published with an explicit date and revised when the underlying legal position changes. The AI Act timeline has moved repeatedly — the Digital Omnibus alone rewrote four deadlines in 2026 — so every analysis states the date it reflects and links the official source it is based on.
The reference pages — deadlines, transparency obligations, GPAI, Annex III — describe the standing legal position. These analyses cover discrete events: a Commission guideline, an enforcement milestone, a Regulation amending the timeline. Use the reference pages to know what applies; use the analyses to know what just changed.
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