Baidu's Ad Revenue Fell 19% While Its Audience Held at 644 Million

🔍 The two numbers that get quoted, and the one that does not

Baidu reported its second quarter 2026 results on 18 August. Two lines from that report have travelled widely. Online marketing revenue fell 19% year on year. Revenue from the AI-powered side of the business crossed the halfway mark of Baidu's general business.

A third line has travelled much less. Baidu App's monthly active users reached 644 million in June 2026.

For an advertiser, the third line decides whether the first two matter. A platform whose ad revenue is falling because its audience is leaving is a platform to avoid. A platform whose ad revenue is falling while its audience stays is a platform where the buying logic has changed. Those are different problems, and they call for different budgets.

This article reads the Q2 2026 filing the way an advertiser would, and separates what the numbers say from what is being read into them.

📊 What the Q2 2026 filing actually reports

Baidu publishes two different cuts of the same revenue, and the two cuts are the source of most of the confusion now in circulation.

The first cut splits Baidu General Business into Online Marketing Services and Others. On this cut, online marketing was RMB 13.1 billion, down 19% year on year, and equal to 52% of general business revenue, against 62% a year earlier.

The second cut splits the same general business into an AI-powered grouping, a legacy grouping, and others. On this cut, the AI-powered business was RMB 12.5 billion, up 25% year on year, and equal to 50% of general business revenue, against 38% a year earlier.

Two things follow from putting the cuts side by side. Neither cut is wrong. They answer different questions, and a headline that quotes a figure from one cut against a percentage from the other will not reconcile.

One line worth reading closely sits opposite online marketing on the first cut. Others, which carries the non-advertising side of general business, was RMB 12.1 billion, up 21% year on year. The money leaving the ad line has a counterpart growing elsewhere in the same P&L.

The wider context in the same filing: total revenue was RMB 31.3 billion, down 4% year on year and 2% sequentially. Operating income was RMB 3.0 billion at a 10% margin. Net income attributable to Baidu was RMB 2.3 billion. Operating cash flow was RMB 3.4 billion, positive for a fourth consecutive quarter.

⚖️ The crossover happened in Q1, not Q2

Many retellings place the moment when AI revenue passed advertising in the second quarter. The filing places it in the first.

In Q1 2026, the AI-powered business was RMB 13.6 billion, or 52% of Baidu's general business, and that was the first quarter it exceeded half. In Q2 2026 it came in at RMB 12.5 billion and 50% — a sequential decline of 8%, and a level roughly even with online marketing rather than clearly above it.

On the absolute figures, online marketing at RMB 13.1 billion was still the larger single line in Q2 2026 than the AI-powered business at RMB 12.5 billion.

The precise version matters for two reasons. The AI-powered grouping includes AI Cloud infrastructure, which is a business an advertiser cannot buy, so its size says nothing directly about what happens in ad auctions. And if you are tracking whether Baidu's ad business is recovering, the line to watch is online marketing, not the AI share.

There is one encouraging detail in that line. Online marketing fell 19% year on year, but it rose 4% quarter over quarter, from RMB 12.6 billion to RMB 13.1 billion. The annual decline is still steep. The sequential direction has turned.

📉 Three reasons the online marketing line is shrinking

Three explanations hold up against the filing, and they carry different implications for anyone planning a budget.

Advertiser budgets, not audience behaviour. The decline sits alongside a softer Chinese advertising market. When domestic marketers pull back, total spend in the auction falls regardless of how many people are searching. This part is cyclical, and it reverses when budgets return.

AI answers absorbing the top of the funnel. Baidu has moved AI-generated summaries into its search results. A user who once clicked through three results to compare a product can now read a synthesised answer on the results page. That removes low-intent clicks first, which is close to the inventory that broad keyword bidding used to buy.

A smaller base to decline from. Q2 2025 online marketing was RMB 16.2 billion. The comparable figure is now RMB 13.1 billion. A 19% decline on a smaller base is a smaller absolute loss than the same percentage would have produced a year earlier.

👥 What is not shrinking

Two figures in the filing argue against reading the ad line as a verdict on the platform.

The audience. Baidu App reached 644 million monthly active users in June 2026. Users did not leave Baidu. They changed how they consume it, and the AI summary is part of the product rather than a substitute for it.

Cash generation. Operating cash flow was RMB 3.4 billion, positive for a fourth consecutive quarter, with operating income at a 10% margin. Baidu is funding the AI transition from operations while cutting costs: selling, general and administrative expenses fell 23% year on year, and research and development fell 10%.

One figure deserves more attention than it has received. AI-native Marketing Services, the part of the AI grouping that an advertiser actually can buy, was RMB 2.6 billion — flat year on year, at 0%. AI Cloud grew 50%. AI Applications grew 3%. Within the AI grouping, the infrastructure line also fell 17% sequentially, while AI-native marketing services rose 11% sequentially off a smaller base. Both movements are small enough that neither settles the question of where the next dollar of ad budget should go.

Read together, this says something specific. Baidu's AI growth in this quarter came from infrastructure sold to enterprises, not from advertising products sold to marketers. Anyone being told that AI-native ad formats are the growth engine should note that the growth is not yet in the numbers.

🎯 What changes for an overseas advertiser

The read-through is narrower than either the optimistic or the pessimistic version.

The auction is less crowded in legacy formats. When domestic advertisers cut budgets, the remaining bidders face less competition on the same inventory. For an overseas brand that has been priced out of broad category terms, this is the window where those terms become affordable.

Value has moved toward the decision moment. If AI summaries now absorb the top of the funnel, the inventory that still converts is the bottom: the model comparison, the brand-against-brand query, the authenticity and after-sales question. These are smaller, more specific, and closer to a purchase.

Do not buy the AI story yet. With AI-native marketing services flat at 0% year on year, the case for shifting budget into AI ad formats is not supported by Baidu's own results. Test them, but treat them as experiments rather than as the replacement channel.

Budget for a narrower, better-built position. The sequential turn in online marketing suggests the floor is near. That argues for holding a position through the next two quarters rather than either exiting or expanding hard.

🏢 Where Baidu PPC Pro comes in

None of the above changes the four things that decide whether an overseas company can act on any of it.

An account without a Chinese entity. Baidu requires a Chinese business licence to open an advertising account. Most overseas brands do not have one, and forming one takes months. Baidu PPC Pro opens and manages the account without it. That is the step which determines whether a brand can be in the auction during the window described above at all.

A keyword map built from local terms. Chinese consumers search the local term for the product category, the local term for the feature, and the local phrase for the problem they want solved. A translated keyword list reaches people and then fails to match them. The comparison queries that carry the highest intent have to be built from observed search behaviour.

Creative that clears review the first time. Advertising in China is filed and reviewed per industry, with claims checked against permitted phrasing. A creative that performs in another market can be rejected on submission here, usually with no advance warning.

Landing pages that answer the search. Chinese-language pages that resolve the comparison the user just typed. Traffic to a page that reads as translated is traffic already paid for and then lost.

📅 The next data point, and notes on the source

Baidu has not yet announced the date of its third quarter 2026 report. The prior-year Q3 results were published on 18 November 2025, so expect mid-to-late November.

Three things are worth watching when it lands.

1. Whether the sequential improvement in online marketing continues, or Q2 was a one-off.
2. Whether AI-native Marketing Services breaks out of flat growth. Until it does, the AI advertising story has no revenue behind it.
3. Whether research and development spending re-accelerates, which management has said to expect as model iteration resumes.

Notes on the source:

• Figures come from Baidu's Second Quarter 2026 results, published 18 August 2026 and furnished to the SEC on Form 6-K. The revenue and operational data are unaudited and derived from Baidu's internal management accounts.
• Baidu reports two separate classifications of the same general business revenue. Figures from the two cuts are not additive, and this article keeps them apart.
• The RMB 12.5 billion figure for the AI-powered business is the second quarter of 2026. The RMB 13.6 billion figure sometimes quoted alongside it is the previous quarter, not a competing estimate of the same period.
• Currency conversions in the filing use the exchange rate as of 30 June 2026.