Microsoft has released one of the largest studies on artificial intelligence conversations, offering a detailed look into how people engage with its Copilot tool across devices and throughout the day. The Copilot Usage Report 2025 analysed 37.5 million anonymised conversations recorded between January and September 2025.
The findings show that the way people use Copilot strongly depends on the device they are on and the time they choose to interact with it. Mustafa Suleyman, the Chief Executive Officer of Microsoft AI, highlighted the insights in a post and shared that researchers identified three major usage trends related to day, time of day, and time of year. He mentioned that one of these patterns remained “rock solid constant”.
The report noted that work and technology topics continued to lead across all devices. However, mobile users showed a different trend. Health related queries were the top category throughout all days and months, and at any hour. Suleyman said, “This is a huge responsibility for us, and one we are super focused on.” The study found that users were not only looking up symptoms but also seeking general advice.
The report also observed clear differences in weekday and weekend usage. Gaming conversations increased on Saturdays and Sundays, while coding related topics were mainly discussed from Mondays to Fridays.
Desktop users were more likely to use Copilot for work related tasks. Between 8 am and 5 pm, conversations centred on professional and technology topics. Even without including workplace accounts, personal desktops showed strong work usage, indicating how personal and professional technology habits have merged over time.
Time of day also influenced behaviour. Early mornings saw a rise in philosophical conversations. Late at night, people turned to Copilot to discuss spirituality, wellness, personal doubts, and life related thoughts. Travel related queries were most common during commute hours.
Seasonal shifts also played an important role. In February, Valentine’s Day drove an increase in relationship conversations. Two to three days before the date, there was a noticeable rise in personal growth and wellness topics. Early in the year, programming discussions were more frequent. By September, social and cultural topics gained more traction, showing how the Copilot audience grew beyond early technical users.
Overall, the report suggests that Copilot’s role continues to evolve with user habits, moving between practical daytime assistance and reflective late night support.
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