A look at some of OpenAI's most important research projects reveals the extent of the talent drain. Of the 31 authors listed in an early version of OpenAI's GPT large language model, fewer than half remain at the company. Several members of the team responsible for developing GPT left OpenAI in 2021 to form Anthropic, nOW a major rival. Roughly a third of those listed in the acknowledgements for a technical blog post describing ChatGPT have since left. This talent drain has not only impacted the quality of research but also the company's ability to innovate and stay ahead of the competition.