Mark Chen is the chief research officer at OpenAI. Chen joins Big Technology Podcast to discuss the debut of GPT 4.5, the company's largest model, which is going live today. In this bonus episode, Chen speaks about what the new model says about the AI scaling wall, how scaling traditional GPT models compares to reasoning models like OpenAI's o1, how important EQ is for AI models today, whether product matters more than models, and how OpenAI's talent bench looks after last year's departures. Tune in for an inside look at what it took to build OpenAI's newest and biggest large language model, and why OpenAI is committed to pushing the frontier forward.