WASHINGTON — The roughly 20 plumbers of Oak Creek Plumbing & Remodeling in the Milwaukee, Wis. area don’t just bring toolkits with wrenches, pliers, and Teflon tape to customers’ homes these days. They also bring a tablet equipped with the latest version of ChatGPT.

The technology helps those workers automatically create invoices and work proposals and even brainstorm how to address complicated plumbing problems, company president Dan Callies told CNN. All they have to do is take photos of a broken water heater, for example, or write their observations in a prompt, and ChatGPT spits out a list of recommendations.

“It’s definitely been worth the investment,” Mr. Callies said. “Some of our older guys have learned to ask ChatGPT the right questions, and they’re kind of amazed with some of a

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