GPT-5, the long-awaited upgrade to the ChatGPT AI chatbot, has been released by its maker OpenAI.

It has been one of the most highly anticipated launches in Silicon Valley after OpenAI's first offering ChatGPT - powered by its GPT-3 model - kick-started the current AI boom in late 2022.

"GPT-3 sort of felt like talking to a high school student," said Sam Altman, OpenAI's chief executive.

"GPT-4, maybe it was like talking to a college student. But with GPT-5, now it's like talking to an expert, a PhD-level expert in anything, any area you need, on demand."

At the launch event, OpenAI claimed the new chatbot, which will be released to all ChatGPT users on Thursday, was more than a simple upgrade to its previous offerings.

According to OpenAI, the new model exceeds the chatbot competitio

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