- Microsoft has analyzed how Copilot users interact with AI across 37.5 million conversations
- There are clear differences between work and personal interactions
- This is how app developers can tailor their chatbot UI
A new December 2025 report from Microsoft has uncovered some key difference among Copilot users in terms of how and when people use AI, and it's based on 37.5 million de-identified Copilot conversations, so there's reason to believe the insights should be pretty accurate.
Drawing a line right down the middle, Microsoft identified that desktop AI use was generally dominated by workers between 8am and 5pm, while mobile use skewed heavily toward personal topics, and was used at all hours.
For personal users, health and fitness prevailed as a key topic, which Microsoft says proves AI is increasingly being trusted for advice, not just information gathering.
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The researchers stressed that enterprise and education data was excluded from the analytics, however millions of personal account holders still use the service for personal and work purposes alike. Microsoft found that programming peaks on weekdays, gaming rises on weekends, and philosophical questions spike late at night.
Redmond claims that mainstream adoption is also on the rise, beyond early adoption among developers and some workers.
In early 2025, Copilot was broadly used for technical and productivity workloads, but by September (the end of this particular study) it was answering more questions about society, culture, and history.
Copilot even sees seasonal trends around the social calendar. For example, relationships and personal growth around Valentine's Day and a dip in education-related topics over the summer.
With the new information, Microsoft has essentially told all AI chatbot developers how they can tailor their UI to usage patterns. "A desktop agent should optimize for information density and workflow execution, while a mobile agent might prioritize empathy, brevity, and personal guidance," the researchers concluded.
"The data suggests that we are not just using AI to do our work faster; we are using it to navigate the complexities of being human, one prompt at a time," they added.
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