OpenAI has this week released GPT-4, the latest version of its globally successful artificial intelligence (AI) chatbot series ChatGPT. Shortly after its release, the US tech lab confirmed that GPT-4 had already been powering Microsoft's Bing search engine for some time prior to its official launch. The Bill Gates-founded firm has already invested US$10b into OpenAI. OpenAI added that the fourth iteration of its GPT series will be able to respond to and interact with images by providing recipe suggestions from ingredient photos, alongside writing captions and descriptions. The hugely popular chatbot has seen phenomenal success since its launch in November last year, and has been used millions of times to produce poems, songs, marketing copy and even computer code.