OpenAI Engineering Team Manager Evan Morikawa shares the success stories of ChatGPT. The engineering team's creative response to hackers involved modifying ChatGPT to CatGPT, which only responds with cat sounds. Optimizing GPU resources has become a key challenge for ChatGPT. Analyzing cross-regional deployment and underlying implementation details helps tackle GPU supply shortages. The ChatGPT team adopted an independent startup model to improve delivery speed.