Systems Research系统研究Oct 30, 20262026年10月30日Note短评

A search API below cost isn't a discount; it buys the doorway.低于成本定价的搜索API并非折扣，而是在购买入口。

A bright, sunlit concept scene under a clean turquoise sky. On the right, a line of small featureless figures seen from behind strolls lightly through one wide, welcoming golden one-way turnstile doorway — the entry side airy and almost free. But the moment each figure steps to the far side, a glowing cable clamps to its back and swells into a dense tangle of thick roots driving into the ground, trapping them so none can walk back out: easy, cheap entry on one side, a mass of rooted tethers on the other. The left 45% is empty sky. Headline in English, "Easy to plug in. Rooted to leave.", with a Chinese line below it, "插上线很容易，离开已被生根绑住".明亮阳光下的概念画面，天空是清澈的青绿色。画面右侧，一队看不清面孔、只见背影的小人轻松地走过一道敞开、金色的单向旋转闸门——进去的一侧开阔、几乎免费。可每个小人刚跨到另一侧，一根发光的电缆就扣住它的背，在远侧膨胀成一丛粗大的树根扎进地里，把它们缠住，谁也走不回来：一边是便宜、轻松的入口，另一边是一大团生了根的绳索。左侧 45% 是留白的天空。标题为英文『Easy to plug in. Rooted to leave.』，下面一行中文『插上线很容易，离开已被生根绑住』。Image: WAKENEX图片：WAKENEX

Baidu just cut the promotional price of its Search AI API to 4.9 yuan per 1,000 calls at a 2026-10-30 Beijing briefing, set deliberately just under DeepSeek's standard 5 yuan. A search API is an agent's eyes: it crawls, indexes and returns live web results for the model, and that carries real compute and bandwidth cost that cannot be near zero.

Yet a row of Chinese providers has driven it to the floor: Qianwen turbo 3 yuan, Volcano 4, Baidu 4.9, DeepSeek 5, Tencent 7, Zhipu and Kimi 10, while comparable web search from Google and Brave runs about 34 and from OpenAI and Anthropic about 67, seven to thirteen times more. The gap doesn't vanish; whoever covers it is buying a position, sitting between your agent and the web.

Once your agent is wired to the cheapest one, what's cheap is the per-call meter; what gets expensive is leaving. Re-wiring means code changes, every query you sent is already in their hands, and your prompts have bent around that provider's ranking and format. "Cheaper is better for me" quietly moves the exit cost onto you.

This breaks if these APIs are thin, standardized interfaces you can switch with one line of config while keeping your own query data — then it is just an ordinary price cut. If you're choosing a retrieval source for an agent, price the cost of switching away first, then decide whom to trust with its eyes.

百度把搜索 AI API 的活动价压到千次 4.9 元，专门卡在 DeepSeek 标准价 5 元之下（10 月 30 日北京发布会）——这不是让利，是用低于成本的价格去抢每个 AI 智能体调用网络的那道『入口』。

拆到底：搜索 API 是智能体的『眼睛』，替模型去抓取、索引、返回实时网页结果，这些有真实的算力和带宽成本，不可能接近零。可现在一排中国厂商把它挤到地板价——通义 turbo 3 元、火山 4 元、百度 4.9 元、DeepSeek 5 元、腾讯 7 元、智谱和 Kimi 10 元；而同类的谷歌、Brave 网页搜索约 34 元，OpenAI、Anthropic 的网页搜索约 67 元，差着七到十几倍。价差不会凭空消失，谁把它补上，谁就是在为一个位置付费：坐在你的智能体和网络之间。

一旦你的 agent 按最便宜的一家接好线，便宜的是每次调用的计价器，变贵的是离开——重接要改代码，你发出的每条查询都已经交到了对方手里，返回结果的排序和格式怪癖也早被你的提示词迁就。『更便宜＝对我更好』这句话，正在把退出成本悄悄转移给你。

什么会推翻它：如果这些搜索 API 是高度标准化、能一行配置切换、且不沉淀你查询数据的薄接口，那依赖就是假的，这只是一次普通降价。对正在给智能体选检索源的人：先算清换一家要付出多少，再决定把『眼睛』托付给谁，而不是只盯着每千次差的那一毛钱。

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