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The Irish Data Protection Commission (DPC) is investigating whether X used personal data from EU users without valid consent to train its AI system Grok. The investigation focuses on public posts from users in the EU and European Economic Area. X had previously committed to permanently stop this practice following a court case last year, which led the DPC to end its earlier investigation. The renewed scrutiny may have been triggered by Elon Musk's xAI acquiring X. As Ireland's lead EU regulator, the DPC can impose fines of up to four percent of a company's global revenue for violations of the General Data Protection Regulation. X was last fined €450,000 by the DPC in 2020. Elon Musk, X's owner, and former US President Donald Trump have repeatedly criticized EU regulations targeting US tech companies.

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Alibaba’s Quark AI Assistant became the most used AI app in China in March, according to data from Aicpb.com. The app reached approximately 150 million monthly active users worldwide, overtaking ByteDance’s Doubao, which had 100 million, and DeepSeek with 77 million. These figures are based on App Store data and do not include website usage. Quark’s rise follows its recent transformation from a cloud storage and search service into an AI assistant. The update, introduced last month, is powered by Alibaba’s Qwen models. The app now supports a range of AI functions, including text and image generation, research assistance, and programming tasks. Other major Chinese tech firms are also expanding their AI offerings. ByteDance is currently testing new video features for Doubao, while Tencent has integrated its Yuanbao assistant into WeChat. A global ranking by Andreessen Horowitz recently placed Quark sixth among the world’s most popular AI apps, behind Baidu’s AI Search and OpenAI’s ChatGPT, which remains in the top position.

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OpenAI plans to remove its GPT-4 language model from ChatGPT on April 30, according to a recent changelog announcement. The company will replace it entirely with GPT-4o, which OpenAI says performs better than the original model across writing, programming, and STEM tasks. While GPT-4 will disappear from ChatGPT, developers can still access it through OpenAI's API. The 2023 model, which CEO Sam Altman indicated cost over $100 million to develop, remains at the center of several ongoing copyright disputes, including a lawsuit from the New York Times.

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