(Recasts to reflect start of event, changes dateline to Mountain View, California)

MOUNTAIN VIEW, California, May 14 (Reuters) - Google parent Alphabet kicked off a presentation on Tuesday where it is expected to show how it is building on artificial intelligence across its businesses, a day after OpenAI demonstrated a new AI model that can work with sound and images.

The new AI features unveiled at the Google I/O developer event in Mountain View, California, will help investors evaluate Alphabet's progress as it races against Microsoft, OpenAI and other competitors to dominate the emerging technology.

Microsoft-backed OpenAI on Monday showcased a new AI model called GPT-4o, which enables ChatGPT to respond via voice in real time and be interrupted - both hallmarks of realistic voice conversations that AI voice assistants like Google Assistant have found challenging.

Shares of Alphabet were near unchanged in Tuesday's trading session.

(Reporting by Max A. Cherney and Jeffrey Dastin in Mountain View, California Additional reporting by Anna Tong in San Francisco, Yuvraj Malik in Bengaluru and Noel Randewich in Oakland, California Editing by Matthew Lewis)