The update to OpenAI's flagship product landed a day before Google is expected to make its own announcements about Gemini, the search engine giant's own AI tool that competes with ChatGPT head on.

"We're very, very excited to bring GPT-4o to all of our free users out there," Chief Technology Officer Mira Murati said at the highly anticipated launch event in San Francisco.

The new model GPT-4o -- the "O" stands for omni -- will be rolled out in OpenAI's products over the next few weeks, the company said, with paid customers having unlimited access to the tool.

The company said the model could generate content or understand commands in voice, text, or images.

"The new voice (and video) mode is the best computer interface I've ever used. It feels like AI from the movies," said OpenAI CEO Sam Altman in a blog post.

Altman has previously pointed to the Scarlett Johansson character in the movie "Her" as an inspiration for where he would like AI interactions to go.

"Talking to a computer has never felt really natural for me; now it does," he added.

Murati and engineers from OpenAI demonstrated the new powers of GPT-4o at the virtual event, posing challenges to the beefed-up version of the ChatGPT chatbot.