OpenAI research finds cross-occupation AI tasks are becoming routine work

OpenAI's economic research team published a new study on September 16 examining how workers use AI on the job, and how that use turns from one-off experimentation into a durable habit. It follows the team's earlier "Work at the Frontier" report, which documented task crossover: workers using AI for activities historically associated with another occupation.

The new question is what happens after that first crossover. Do workers come back to tasks outside their occupational boundaries, and do those activities take up a growing share of their AI use over time?

The study covered more than 1.5 million work-related ChatGPT messages from April through July 2026, tracking roughly 6,200 workers consistently across the four-month window. Cross-occupation tasks rose from 13.1% of occupation-specific AI activity in April to 25.9% in July.

Workers also prompt differently depending on whether a task sits inside or outside their role. For out-of-role tasks they write shorter prompts on average and ask for explanations, how-to guidance or specific formats less often, but they are more likely to supply examples and background information and to ask AI to check or verify something.

One reading of that pattern is that workers are borrowing expertise rather than learning a new field from scratch: they bring a concrete problem and relevant context, then ask AI to apply knowledge from another domain.

For companies, the report argues that work design deserves a place alongside access to AI tools in any AI strategy. If those cross-occupation tasks keep recurring, jobs can broaden even while their titles stay the same, which raises new questions about role definitions, performance review, training and internal collaboration.

The data covers ChatGPT usage only, so it cannot say whether these tasks were done well or created measurable business value. The next test is whether organizations redraw responsibilities around this behavior, or simply treat AI as another tool bolted onto existing roles.