"The Latest: xAI has released a free iOS app for its Grok chatbot in the US, offering features like real-time information retrieval and image generation, following a shift from its previous premium-only model last month. Why It Matters: Backed by $12 billion in funding from tech giants Nvidia and AMD, xAI's free Grok app now directly competes with established chatbots like ChatGPT and Google Gemini, potentially reshaping AI accessibility."