EU designated ChatGPT a Very Large Online Search Engine under the DSA on 31 Aug 2026: 159M EU users, audits, researcher access, Jan 2027 deadline. GEO impact.
On 31 August 2026 the European Commission designated ChatGPT a Very Large Online Search Engine (VLOSE) under the Digital Services Act — the first AI chatbot to carry the label, which it now shares with Google Search and Bing. The trigger was OpenAI’s own report of about 159.1 million average monthly active recipients of ChatGPT search in the EU over the six months to 31 March 2026, more than three times the 45-million threshold. Reddit (57.2 million) and Roblox (46.6 million) were designated as very large platforms in the same batch. OpenAI has four months — to January 2027 — to comply with the systemic-risk, audit, data-access and ad-transparency obligations, with fines of up to 6% of global annual revenue for breaches.
The legal point is narrow: the designation turns on ChatGPT’s live web-search function, not on it being an AI product. The practical point is wide: a regulator with subpoena-grade data access has just decided that an LLM answering questions with web results is a search engine, and search engines have obligations to the sites they index. Sources: the Commission’s designation, Search Engine Journal’s and Business Standard’s reporting, and Commissioner Henna Virkkunen’s statement that the three services “will now be held to a higher standard of scrutiny and accountability”.
What OpenAI now has to do
| DSA obligation | What it means in practice |
|---|---|
| Identify, assess and mitigate systemic risks tied to the service and its algorithms | Documented risk assessments covering illegal content, minors, well-being, fundamental rights, elections and public security — for a system that generates answers, not just ranks them |
| Annual independent audits, with a written response to findings | Third parties get to test how ChatGPT search selects, weights and cites sources |
| Data sharing with the Commission and national authorities | Regulators can demand ranking and retrieval data |
| Vetted-researcher access for systemic-risk studies | Academics get a legal route to study citation patterns — the first public look at how an LLM search engine chooses sources |
| A recommender option not based on profiling | Where applicable, an answer mode that does not personalise on user history |
| Public advertisement repository | Any ads inside ChatGPT become searchable public records |
Designation is not a finding of wrongdoing; enforcement is a separate process. The Commission has levied about €870 million in DSA fines so far, including €550 million against AliExpress in July 2026, so the 6% ceiling is not decorative.
Why this matters more than the fine
For the last two years, generative engine optimisation — getting your pages cited in AI answers — has been reverse-engineering from the outside. Which sources get picked, how recency is weighted, whether citations favour large domains: all guesswork from sampling answers. Two DSA obligations change that. Vetted-researcher access means peer-reviewed studies of ChatGPT’s retrieval and citation behaviour can be built on real data rather than scraped samples. Annual audits mean the selection logic gets described in documents whose summaries become public.
The second consequence is precedent. The Commission has said, in effect, that an AI system with live retrieval is a search intermediary. Perplexity, Google’s AI Mode (already covered under Google Search’s designation) and any future Claude or Gemini search product with 45 million EU users inherits the same obligations. The category now exists; it will fill.
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