Alphabet, Google's parent company, became the fourth company to reach a $4 trillion value Monday after Apple said it will use Gemini for AI.

Alphabet topping a $4 trillion valuation on Monday marks the first time in seven years the Google parent has surpassed Apple's valuation.

Apple will use Google's Gemini models for its revamped Siri coming later this year under a multi-year deal that deepens the tech giants' alliance in the artificial intelligence era and bolsters Alphabet's position in the race against OpenAI.