Hydrogen fuel cells have existed as a technology for well over a century, but their intersection with artificial intelligence is a story that begins in earnest only in the early 2020s. Today that convergence is reshaping how fuel cells are designed, manufactured, tested, operated, and deployed — across applications ranging from heavy-duty transport to the power-hungry data centers driving the global AI boom. Hyperscalers are expected to spend 700billiononcapitalexpenditurein2026alone,andcommittedcleanhydrogeninvestmentsin2025stoodat700 billion on capital expenditure in 2026 alone, and committed clean hydrogen investments in 2025 stood at 110 billion across 510 projects. This article traces how the AI-hydrogen fuel cell relationship reached this point, milestone by milestone.