According to a new study from Harvard Business Review, some AI usage patterns can increase mental fatigue, while others may help ease burnout. The study gained widespread attention and was covered by outlets such as CNN and CNET.
A Boston Consulting Group study found that managing multiple AI agents can lead to “AI brain fry,” a state of mental fatigue that affects focus and clarity. Researchers describe it as a mental fog that can cause headaches and make it harder to concentrate, often due to too much information and frequent task switching.The problem gets worse when AI systems handle more work than people can easily keep up with, even if they take over routine tasks. Many participants said they felt overloaded and found it hard to stay focused.
Contrary to the promise of having more time to focus on meaningful work, juggling and multitasking can become the definitive features of working with AI. This AI-associated mental strain carries significant costs in the form of increased employee errors, decision fatigue, and intention to quit.
– Harvard Business Review
The researchers said that managing multiple AI tools can feel like learning a complex new skill. They compared it to driving a high-performance car for the first time, which can lead to temporary mental overload. They also likened it to someone from 1986 trying to navigate a modern workplace in 2026.
The study found that “AI brain fry” can lead to lower-quality decisions, more decision fatigue, and a higher chance of errors. Matthew Kropp, a co-author of the study and a managing director at BCG, told CNN, “I do think this is temporary. These are tools we haven’t had before. When people take a break, the feeling goes away.”
Kropp also noted that the experience may have a positive side, as it can help reduce burnout, a form of long-term workplace stress.
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