ChatGPT Joins EU’s Biggest Online Platforms, Triggering Stricter Oversight Under Digital Services Rules

ChatGPT has entered the European Union’s highest tier of digital-platform oversight after surpassing 45 million monthly users in the bloc. The designation places OpenAI’s chatbot among the Very Large Online Platforms, or VLOPs, covered by the strictest obligations under the EU Digital Services Act.

Reddit and Roblox also crossed the same user threshold and received the designation alongside ChatGPT, according to Bloomberg AI, The Verge and WHBL. The classification is based on audience size, so it applies to services whose reach gives them an unusually large role in shaping online information, behavior and access to digital services.

OpenAI will face broader duties to identify and reduce systemic risks linked to ChatGPT’s operation in the EU. Those risks include the spread of illegal content, effects on minors, and possible harm to users’ mental health, The Verge reported.

The DSA framework requires very large services to assess systemic risks, document mitigation measures and provide greater transparency around how their systems operate. Coverage from Gizmodo, Mercurynews and Insidetelecom framed the change as the strictest layer of European digital oversight, extending rules traditionally associated with major social networks and online platforms to a leading AI chatbot.

ChatGPT’s classification tests how the EU applies platform regulation to generative AI. A chatbot can produce text, answer questions and guide users through decisions, while also influencing what users believe, share or do. That reach gives regulators a reason to examine more than model accuracy or data protection alone.

The designation also places OpenAI in a regulatory group that includes services with very different business models. Reddit hosts user-generated communities, Roblox operates a large gaming ecosystem, and ChatGPT generates responses directly in conversation. Their common factor is audience scale, while the risks and compliance methods differ. Siliconrepublic, The Next Web and DW highlighted the wider debate over whether existing digital rules adequately capture AI systems’ social effects.

OpenAI will need to show how it evaluates and limits risks associated with ChatGPT’s use in the European market. That work includes safeguards for young users, processes for handling illegal material, and evidence that risk assessments lead to concrete product or operational changes.

The designation doesn’t automatically ban ChatGPT or require the service to leave Europe. It creates a more demanding supervisory framework, with scrutiny centered on risk management, transparency and accountability. CNBC described the development as part of Europe’s broader effort to regulate powerful AI services, while Digital.nemko and Aisigil emphasized the practical challenge of aligning ChatGPT’s fast-changing capabilities with EU requirements.

The decision sets a signal for other AI companies whose European user bases continue to grow. Reaching the 45-million-user threshold can turn a widely used chatbot from a general online service into a platform subject to the EU’s most intensive obligations, regardless of whether it began as a search tool, assistant or creative application.

For users, the immediate effect is greater regulatory accountability rather than a visibly different ChatGPT interface. Companies serving European users will watch how the Commission interprets systemic risk, especially around children, emotional reliance and illegal content. The treatment of Reddit and Roblox also shows that the EU is applying the size-based regime across the internet, not only to generative AI.

OpenAI’s next phase will involve demonstrating compliance with the DSA’s VLOP obligations while continuing to operate ChatGPT in the EU. Regulators will assess whether the company’s safeguards, risk assessments and transparency measures address the harms associated with the service’s scale and capabilities.

The classification is an early test of Europe’s ability to supervise conversational AI through platform rules. Its outcome will influence how regulators handle future AI services that become mass-market products, and how companies balance rapid feature development with obligations tied to public reach. Debate over whether the rules are too strict, raised by Basic-tutorials and DW, will continue as enforcement develops.