Baidu, Inc. (BIDU) shares dipped after the Chinese tech giant reported numbers that tell two very different stories. On one hand, its AI Cloud business is taking off. On the other, its traditional advertising engine is sputtering badly enough to drag the whole company into negative free cash flow territory.

The company posted quarterly revenue of $4.38 billion, down 7% year-over-year. That's actually better than the $4.31 billion analysts were expecting, but it's still a decline—and those are rare for a company of Baidu's scale. Adjusted earnings per American Depositary Share came in at $1.56, comfortably ahead of the 91-cent forecast.

Here's where things get interesting. Baidu's core revenue dropped 7% to $3.46 billion, with online marketing revenue collapsing 18% to $2.16 billion. That's the old business model showing its age. But non-online marketing revenue jumped 21% to $1.31 billion, powered almost entirely by the company's AI Cloud operations.

Revenue from iQIYI (IQ), Baidu's streaming platform, came in at $938.70 million—slightly above the $932.66 million consensus but still down 8% year-over-year. The streaming wars aren't getting any easier in China, either.

The expense picture shows a company in transition. Selling, General, and Administrative costs climbed 12% to $924 million, driven by higher expected credit losses and channel spending. Research & Development expenses, meanwhile, fell 3% to $728 million—though that doesn't mean Baidu is spending less on innovation. Much of the AI investment appears to be flowing through other parts of the business.

Margins took a hit. Adjusted EBITDA margin fell to 14% from 26% a year ago. Core adjusted EBITDA margin dropped even more dramatically, from 31% to 18%.

Baidu ended September with $41.64 billion in cash and equivalents, so there's no liquidity crisis here. But free cash flow told a different story: an outflow of $302 million for the quarter. Strip out iQIYI and you're still looking at a $261 million outflow. That negative cash flow is the price of going all-in on AI.

CEO Robin Li emphasized the momentum in AI Cloud as more enterprises adopt Baidu's products and solutions. He highlighted Apollo Go's rapid expansion of fully driverless ride-hailing operations—including a recent move into Switzerland—while maintaining strong safety performance. The company is also seeing fast revenue growth from AI-native tools like agents and digital humans.

CFO Haijian He said AI Cloud's growth helped offset the weakness in online marketing. The strategic AI investments are starting to pay off: revenue from AI-powered businesses rose more than 50% year-over-year to about 10 billion Chinese yuan (roughly $1.4 billion) in the third quarter of 2025.

So Baidu is essentially rebuilding itself in real time—trading today's advertising dollars for tomorrow's AI revenue. The question is whether AI Cloud can scale fast enough to replace what's being lost in traditional search advertising. For now, investors seem skeptical.

Price Action: BIDU shares were trading down 0.87% to $113.12 in premarket trading Tuesday.