NVIDIA's commanding lead in artificial intelligence hardware, driven by surging demand for its GPUs powering large language models and data center expansions, underpins the market's 87.5% implied probability that it remains the world's largest company by market cap at the end of June. Recent earnings momentum, record valuations surpassing $5 trillion, and analyst upgrades highlighting accelerating AI sales have reinforced its position over Alphabet, whose strong cloud growth and AI investments have narrowed the gap but not yet overtaken the leader. With resolution just weeks away, traders are monitoring any shifts in semiconductor supply chains or major model releases that could alter competitive dynamics among the top tech firms.