Microsoft is extending OpenAI’s o1 reasoning model to all Copilot users at no additional cost, Tom Warren reports. The feature, called “Think Deeper,” enables more complex question handling and provides detailed step-by-step answers. It was previously available only to premium subscribers. The tool takes approximately 30 seconds to analyze questions from multiple perspectives. Microsoft AI CEO Mustafa Suleyman announced the expansion on LinkedIn, highlighting that tens of millions of users will now have access to this capability. The feature, which was initially launched in October through Copilot Labs, supports various applications including code creation, comparison analysis, and travel planning.