The UK competition regulator has officially launched an investigation into Microsoft's partnership with OpenAI, focusing on whether it involves a 'takeover of control'. Changes in OpenAI's leadership have triggered this investigation, particularly examining whether Microsoft has gained substantial control over OpenAI. The inquiry looks into whether the collaboration impacts market competition, given Microsoft's $13 billion investment, making it the largest investor. The Competition and Markets Authority aims to prevent the concentration of the artificial intelligence market in the hands of a few companies and is gathering comments in advance for the investigation.