Elon Musk and Sam Altman speak onstage at the Vanity Fair New Establishment Summit on October 6, 2015 in San Francisco, California, back when they were still friends. Two of the most prominent names in AI,

The rollout was even messy enough to spill into betting markets. One 27-year-old day trader, Foster McCoy, pocketed $10,000 in just a few hours by wagering that Google’s Gemini would beat GPT-5 in a popularity contest.

Elon Musk praised OpenAI's GPT-5 model as impressive despite previously stating his Grok 4 Heavy model remains competitive. OpenAI had touted the reduced hallucinations in GPT-5 as one of the top features during the model launch.

It's not hard to imagine OpenAI CEO Sam Altman uses his company's own product, ChatGPT, instead of Google Search.