Welcome to The Daily AI Briefing, here are today's headlines. In today's briefing: OpenAI launches Deep Research assistant and releases o3-mini model, Sam Altman addresses open source concerns, DeepSeek faces security breach, and the EU activates its AI Act. Plus, developments from Google X and Microsoft in AI research. First, OpenAI has unveiled Deep Research, a powerful new ChatGPT feature designed for comprehensive web research. This tool can analyze multiple sources including text, images, and PDFs to deliver detailed reports with citations in under 30 minutes. Currently available to Pro subscribers at $200 monthly with 100 queries per month, it has shown impressive results, achieving 26.6% on Humanity's Last Exam, significantly outperforming competitors. The company plans to expand access to Plus and Team users in the coming weeks. In related news, OpenAI has also released o3-mini, a cost-efficient reasoning model bringing advanced STEM capabilities to both free and paid users. The model demonstrates improved performance in technical domains while operating 24% faster than its predecessor. Notably, it costs 63% less to run at $1.10 per million input tokens. This release marks the first time free users can access sophisticated reasoning capabilities, with paid users receiving up to 150 messages daily. During a recent Reddit AMA, OpenAI CEO Sam Altman made headlines by acknowledging the company's stance on open source might need revision. Altman admitted OpenAI has "been on the wrong side of history" regarding open source and needs to develop a new strategy. He also provided updates on upcoming releases, including the full o3 version expected within a few months. Security concerns have emerged in the AI sector as researchers uncovered an exposed DeepSeek database containing over one million user prompts and API key records. This breach has raised significant privacy concerns and highlighted potential vulnerabilities in AI infrastructure security. Meanwhile, the EU has activated the initial phase of its AI Act, implementing bans on "unacceptably risky" AI systems with substantial penalties of up to €35 million for violations. In corporate developments, Google X has launched Heritable Agriculture, an innovative venture using AI to revolutionize plant breeding for improved crop yields. Simultaneously, Microsoft AI has established a new cross-disciplinary research unit under CEO Mustafa Suleyman, bringing together economists, psychologists, and other experts to study AI's broader societal impact. As we wrap up today's briefing, it's clear that the AI landscape continues to evolve rapidly, with major developments in research capabilities, security challenges, and regulatory frameworks shaping the industry's future. Thank you for listening to The Daily AI Briefing. Stay informed, and we'll see you tomorrow with more AI news and updates.