FAQ: What beverage was Coca-Cola’s first diet soft drink? Q: When was Coca-Cola’s first diet soft drink introduced? In 1963, Coca-Cola introduced its first diet soft drink called “Tab”. Learn more about Tab Q: What was the first diet soft drink created by Coca-Cola? The first diet soft drink created by Coca-Cola was “Tab”. Learn more about Tab Q: What year did Coca-Cola release its first diet soft drink? Coca-Cola released its first diet soft drink, “Tab”, in 1963. Learn more about Tab Q: Which was Coca-Cola’s original diet soft drink? Coca-Cola’s original diet soft drink was “Tab”. Learn more…