Beyond Nvidia: the search for AI's next breakthrough

TORONTO, Canada — For a few days the AI chip juggernaut Nvidia sat on the throne as the world's biggest company, but behind its success are questions on whether new entrants to the artificial intelligence realm can stake a claim in the bonanza.

Nvidia, which makes the processors that are the only way to train generative AI's large language models, is now big technology's newest member, and its stock market takeoff has lifted the whole sector.

Even technology's second rung on Wall Street has ridden on Nvidia's coattails with Oracle, Broadcom, HP and a spate of others seeing their stock valuations surge, despite sometimes shaky earnings.