OpenAI's ChatGPT has reached 200 million weekly active users, doubling its user base from last year, with significant contributions from the integration of ChatGPT into Apple's iOS 18. The AI tool's API usage has also surged following the release of the more capable GPT-4o Mini model. OpenAI is reportedly in talks for a new funding round led by Thrive Capital, which could value the company at over $100 billion. Apple, Nvidia, and Microsoft are among the potential investors, with Apple looking to strengthen its AI strategy through this partnership. Microsoft, already a major investor with $13 billion invested, is also expected to participate. This new funding reflects the intense competition in the AI sector as companies strive to stay ahead in the market.