AI is the new Grinch that’s stealing Christmas.

Nervous laughter was Kelly Bowron’s visceral, hysterical response to her son learning the truth about Santa Claus on Tuesday — courtesy of a Google search.

Her little Leo, age 11 — whose belief in the jolly old elf had remained firmly intact from childhood to preadolescence until this week — simply wanted to know St. Nick’s spending budget, per child, worldwide.

Unfortunately, however, Google’s AI overview instantly turned his merry curiosity into holiday dismay with its answer, reading, “There is no set amount Santa spends per child, as he is a fictional character.”

“He screamed, ‘A fictional character?’” Bowron, a UK mother of two, told The Post. “And I was shocked, laughing in disbelief, telling him, ‘No, no. Google doesn’t always tell

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