Apple’s head of artificial intelligence John Giannandrea plans to step down from his post, ending a troubled tenure at the iPhone maker. Apple said in a statement Monday that Gianandrea, who served as senior vice president of machine learning and artificial intelligence strategies, will remain an adviser before he fully retires from the company in the spring. On the other hand, the company announced that artificial intelligence researcher Amar Subramania has joined it as vice president of artificial intelligence. He will report to chief software officer Craig Federighi, and will oversee Apple’s foundational models, machine learning research, and the safety and evaluation of artificial intelligence systems. Also read: Big tech companies bet on our laziness… and win the bet. Subramanya spent 16 years at Google, a subsidiary of Alphabet, and most recently served as corporate vice president for artificial intelligence at Microsoft.