Perplexity's CEO Aravind Srinivas used the early days of Elon Musk and SpaceX—when the billionaire refused to give up even after rockets would blow up—as a source of inspiration for his career.

The shopping upgrade is integrated into OpenAI's latest AI model, GPT-4o, and comes as ChatGPT's search function has exploded in popularity, according to the company. Users ...