OpenAI, the artificial intelligence start-up behind chatbot ChatGPT, announced Monday it is rolling out a "new flagship model" that will be available to users for free.

The Microsoft-backed company introduced its new GPT-40 model during a livestream, and showed off its features including real-time conversation skills.

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The announcement comes a day before Tuesday's start of rival Google's annual I/O conference, where the tech giant is expected to unveil a slew of AI-related products.

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