The Irish data protection authority (DPC) is probing how Grok, the AI application of Elon Musk-owned tech platform X, uses personal data to train its model.

Last year, the DPC filed court proceedings against the social media company for violating privacy rights when the platform quietly changed its data settings to automatically opt in to training its new AI model, which competes with OpenAI’s Chat GPT and Google’s Gemini.

X then vowed to stop the data processing, after which it became available in the EU.

However, the DPC appears not to be satisfied with the changes. It said in a statement, made public late on Friday that “the Inquiry will examine compliance with a range of key provisions of the GDPR, including with regard to the lawfulness and transparency of the processing.”

Earlier this month, Euronews reported that the Irish watchdog is also in discussions with Meta-owned messaging app Whatsapp over the introduction of the AI feature MetaAI.

Several tech platforms, including Google, Meta and X have rolled-out AI features in Europe in recent weeks, claiming that the introduction in the EU took longer due to regulatory difficulties.

If found guilty of a GDPR-breach, X could face a fine of up to 20 million euros, or up to 4 % of its total global turnover, whichever is higher.