When 'OPENAI' Isn't a Trade Mark: The EU Ruling Every AI Brand Owner Must Heed

Fame Is Not Distinctiveness

On 15 July 2026, the General Court of the European Union delivered its judgment in OpenAI, Inc. v EUIPO (Case T-555/25), confirming the partial refusal to register the EU word mark OPENAI for goods and services in Classes 9, 42 and 45. The court dismissed OpenAI's appeal in its entirety and ordered the company to pay costs: a result with blunt implications for every AI-sector brand.

The core legal logic is straightforward, even if the commercial shock is not. The EUIPO had found that the word 'open' would be understood by the relevant public as meaning 'freely accessible', and that its combination with 'AI' would be interpreted as referring to products built on openly accessible artificial intelligence. The court agreed: the combination was not an unusual linguistic pairing in English, and for categories including software and cloud-computing services it was therefore purely descriptive and lacked the distinctiveness required for trade mark protection.

OpenAI had argued that 'OPENAI' was a coined term without a fixed meaning, and pointed to registrations it held in more than 30 countries, including the United Kingdom. The court rejected those arguments. The judgment did not touch the company's figurative mark (the logo retains its protection) and left open an acquired-distinctiveness route under Article 7(3) EUTMR, through which OpenAI can attempt to demonstrate that consumers overwhelmingly associate the term with a single commercial origin. That process will depend on consumer-recognition evidence rather than corporate fame alone.

What Classes 9, 42 and 45 Mean for AI-Sector Filings

The classes at the heart of the refusal matter enormously to this readership. Class 9 covers software and electronic apparatus; Class 42 takes in SaaS, cloud computing and AI-as-a-service (AIaaS, added explicitly to the Nice 13th Edition in January 2026); Class 45 covers legal and security services including identity verification. These are the core filing classes for any AI-sector company building a digital product.

The 13th edition of the Nice Classification, in force since 1 January 2026, now explicitly recognises 'artificial intelligence as a service' within Class 42, making precise specification more important, not less. Virtual goods must be defined with clarity and precision under the new EUIPO Guidelines that entered into force on 1 July 2026; the term 'virtual goods' alone is not accepted. Vague, generic specifications are now the enemy of protection at both the EUIPO and, increasingly, the UKIPO.

The stakes in Class 9 are sharper than many UK legal-sector companies realise. According to AIBD analysis of Companies House and IPO data as of July 2026, Class 9 UK trade mark filings reached just 2,751 in Q3 2026, a fall of 71% on the prior period. Among SIC 69.10 companies (legal and accounting activities), the protection gap is stark: 99.4% of active firms in that cohort hold no Class 9 trade mark at all. That figure sits uncomfortably alongside a sector rapidly deploying AI-branded tools and services that fall squarely within Class 9's scope. New SIC 69.10 company formations also dropped to 150 in Q3 2026, down 78.7% on the prior period, suggesting the pool of newly incorporated legal-tech ventures entering the market without trade mark coverage is thinning but not disappearing.

The 'Descriptive by Design' Trap

The OpenAI ruling is a textbook example of what practitioners sometimes call the 'descriptive by design' trap: a name chosen precisely because it communicates the product's nature (open, accessible, AI-driven) turns out to communicate it so clearly that it cannot function as an origin indicator. The same logic is latent in scores of AI product names currently circulating. Anything ending in 'AI', 'GPT', 'Bot', or 'Copilot', or prefixed with 'Smart', 'Auto', or 'Open', is liable to be read as descriptive of artificial intelligence or its application.

There is a parallel in UK trade mark history. 'Baby Dry' survived in Europe in 2001 precisely because of an 'unusual syntactic juxtaposition' that made it fanciful rather than merely descriptive. 'OPENAI' had no such saving grace: the General Court found nothing unusual about the combination.

The UKIPO's own modernisation trajectory adds a further dimension. The office has confirmed it will start exploring AI tools, including for managing non-traditional trade mark filings such as sounds and gestures, as part of an overhaul beginning in September 2026. A parallel shift in patent examination, following the Supreme Court's February 2026 judgment in Emotional Perception AI v Comptroller General, is being formalised by UKIPO practice notes, with a hearing on the original application scheduled for 4 August 2026. Both developments point in the same direction: the UKIPO is actively recalibrating how it handles AI-adjacent IP, and the gap between a company's AI ambitions and its registered protection is growing more legally consequential by the month.

Clarivate's Trademark Filing Trends Report 2026 noted that, despite rapid commercial influence, most major AI companies did not feature among the highest trade mark filers, suggesting brand formalisation in the sector is still emerging. 'OPENAI' losing at the General Court is the loudest possible argument for closing that gap urgently.

What Brand Owners Should Do This Week

Audit every AI-facing brand name you use, whether as a product, service line, or sub-brand, and stress-test it against the descriptiveness criteria confirmed in OpenAI v EUIPO. If the name tells a consumer what the product is rather than who makes it, a purely word-mark application faces serious risk. Layered strategies, combining a figurative mark (registered) with a word mark (pursued via acquired-distinctiveness evidence), are now the minimum viable approach for any AI brand trading in the EU. For the UK register, run a full Nice-class audit across 9, 42 and 45 before the UKIPO's September overhaul changes the search landscape. TrademarkDashboard (trademarkdashboard.com) provides free class-level searching and clearance reports to establish your baseline. Then speak to a qualified IP attorney before filing.