Microsoft CEO Satya Nadella announced that OpenAI's ChatGPT is the largest user of Microsoft’s Cosmos DB at the Microsoft AI Tour in Bengaluru. Cosmos DB supports real-time interactions essential for ChatGPT's functionality. Nadella emphasized the importance of cloud-native databases for modern AI applications and highlighted Microsoft's $3 billion investment in Azure data centers in India to enhance capacity for rising AI demands, reinforcing Cosmos DB's role in next-generation AI infrastructures.