Welcome to The Daily AI Briefing! I'm your host, bringing you the most significant AI developments from around the globe on this Tuesday. Today we're diving into a controversial AI experiment on Reddit, Meta's exciting new AI offerings, OpenAI's latest model integration, a breakthrough in Alzheimer's research, and more. Let's explore how artificial intelligence continues to reshape our world, for better and sometimes worse. In today's episode, we'll cover Reddit's unauthorized AI experiment scandal, examine Meta's major announcements from LlamaCon, walk through integration steps for OpenAI's o4-mini, look at AI's role in a potential Alzheimer's breakthrough, and touch on trending AI tools and job opportunities. First up, a troubling story from Reddit. The platform revealed that University of Zurich researchers conducted an unauthorized AI experiment on the r/changemyview community. These researchers deployed chatbots across more than 1,700 comments, impersonating various identities including trauma survivors and counselors. What's particularly concerning is that they used a separate AI system to analyze users' posting histories, capturing personal details like age, gender, and political views to create targeted responses. The results showed these AI responses were six times more persuasive than average human comments. Reddit has announced legal action against the researchers, with their Chief Legal Officer calling the experiment "deeply wrong on both moral and legal levels." The University has halted publication of the research and launched an internal investigation. This incident highlights how easily coordinated bots could potentially influence public discourse. Moving to more positive developments, Meta made several major AI announcements at its first LlamaCon developers event. The company unveiled a standalone app for its Meta AI assistant with enhanced personalization features. This new app leverages Llama 4, learns user preferences, and can access profile information with permission to provide more context-aware responses. Voice interaction is emphasized alongside text input and image generation. Meta also released the Llama API as a limited free preview, giving developers access to the latest Llama 4 Scout and Maverick models. New security tools include Llama Guard 4 and LlamaFirewall, with a Defenders Program offering select partners access to AI-enabled security evaluation tools. Mark Zuckerberg discussed these developments and more on the Dwarkesh Podcast ahead of the event. For developers looking to integrate cutting-edge AI capabilities, OpenAI has released a tutorial on using their o4-mini API. This guide walks through the process of implementing powerful AI reasoning functions into existing projects at low cost and high throughput. The steps include obtaining an API key from OpenAI's platform, setting up your environment in Google Colab, implementing the API call, and customizing content prompts for specific needs. The tutorial also offers a helpful tip about reducing costs during development by testing with shorter outputs before scaling up implementation. In a remarkable scientific breakthrough, UC San Diego researchers have used AI to discover a surprising new cause of Alzheimer's disease. Their AI imaging system identified that a common protein called PHGDH has a previously unknown ability to interfere with brain cell functions, leading to early signs of Alzheimer's. Traditional lab methods had missed this connection for years. Even more promising, the team found that an existing compound, NCT-503, can stop this harmful protein behavior while allowing it to continue its normal functions. Mouse trials showed improvements in both memory and anxiety-related symptoms. Unlike current treatments requiring infusions, this potential new drug could be taken as a simple pill and works preventatively rather than attempting to reverse existing damage. Among trending AI tools this week are Alibaba's Qwen3, a new ope