Alphabet's Gemini 3.5 Pro Is Late and the Stock Is Slipping. Is the AI Leader Falling Behind?

When Alphabet (NASDAQ: GOOG)(NASDAQ: GOOGL) introduced Gemini 3.5 Flash at its I/O developer conference in mid-May, the company said the model's more powerful sibling, Gemini 3.5 Pro, would arrive in June. June came and went. On Thursday, Bloomberg reported t…