How ‘Based’ Is Grok 3? + Robinhood C.E.O. Vlad Tenev on Markets for Everything + Vibecoding 101

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This week, Elon Musk brought a new chatbot into the crowded A.I. universe — Grok 3, the latest model from his company xAI. We break down how it compares with other leading models and what it reveals about Musk’s larger ambitions. Then, Vlad Tenev, the chief executive of the investing platform Robinhood, lays out his vision for the future of investing and fields some difficult questions about his company’s role in fueling a culture of risky financial speculation. Finally, Kevin revisits his high school coding era and tries to make Casey a new software tool, with an A.I. assist.

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Credits

“Hard Fork” is hosted by Kevin Roose and Casey Newton and produced by Whitney Jones and Rachel Cohn. The show is edited by Rachel Dry. Engineering by Alyssa Moxley and original music by Dan Powell, Elisheba Ittoop, Marion Lozano, Diane Wong and Rowan Niemisto. Fact-checking by Caitlin Love. Our executive producer is Jen Poyant.

Special thanks to Paula Szuchman, Pui-Wing Tam, Dahlia Haddad and Jeffrey Miranda.