Jan 12 (Reuters) - Apple (AAPL.O) 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.

Apple was facing increasing questions about its plans for artificial intelligence as other big tech companies invested tens of billions in the technology.