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OpenAI has released GPT-4, the latest version of its hugely popular artificial intelligence chatbot ChatGPT.

The new model can respond to images - providing recipe suggestions from photos of ingredients, for example, as well as writing captions and descriptions.

It can also process up to 25,000 words, about eight times as many as ChatGPT.

Millions of people have used ChatGPT since it launched in November 2022.

Popular requests for it include writing songs, poems, marketing copy, computer code, and helping with homework - although teachers say students shouldn't use it.

ChatGPT answers questions using natural human-like language, and it can also mimic other writing styles such as songwriters and authors, using the internet, as it was in 2021, as its knowledge database.

There are concerns that it could one day take over many jobs currently done by humans.

For more on GPT-4, Newshour's Razia Iqbal has been speaking to AI researcher Henry Ajder. She began by asking him to explain what ChatGPT is.

Photo shows: A young man visits and tries out OpenAi's new GPT-4 in Shanghai, China, March 15, 2023. Credit: Getty Images

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