US tech giant OpenAI on Monday unveiled a ChatGPT tool called “deep research” that can produce detailed reports, as China’s DeepSeek chatbot heats up competition in the artificial intelligence (AI) field. The company made the announcement in Tokyo, where OpenAI chief Sam Altman also trumpeted a new joint venture with tech investor SoftBank Group to offer advanced artificial intelligence services to businesses. Altman and SoftBank founder Masayoshi Son will meet the Japanese prime minister later on Monday and will reportedly announce plans to boost Japan’s AI infrastructure. It comes as AI newcomer DeepSeek has sent Silicon Valley into a frenzy , with some calling its high performance and supposed low cost a wake-up call for US developers. OpenAI, whose ChatGPT led generative AI’s emergence into public consciousness in 2022, said its new tool “accomplishes in tens of minutes what would take a human many hours”. “You give it a prompt, and ChatGPT will find, analyse, and synthesi...