An AI agent is a system that takes a goal and carries out several steps on its own — searching, calling tools, writing, checking — rather than answering a single question. It acts, then observes the result, then acts again.
AI 智能体是给定目标后能自己走多步的系统：检索、调用工具、写作、校验，而不是只回答一个问题。它先行动，看到结果，再决定下一步。
Agents change the economics of software because they replace hours of work rather than a single query. That is why the market sizes them by tasks automated, not by seats. It also changes the risk profile: an agent with access to tools can send the email, delete the file or place the order, so the permission model matters as much as the model itself.
智能体改变软件的经济学，因为它替代的是「几小时的工作」而不是「一次查询」。所以市场按自动化的任务数给它估值，而不是按席位。
它也改变了风险结构：能调用工具的智能体，真的可以发邮件、删文件、下单。所以权限模型和模型本身一样重要。
| Move变动 | Where it appeared出现位置 | What it means这句话在说什么 |
|---|---|---|
| — | Apple's new CEO moves to overhaul the company to run faster and leaner AI 智能体 · 第 9 张术语卡 | Bank of America warns that third-party consumer agents could “change the economics of mobile commerce”; Meta's Muse passed 2.5 million downloads in its first two weeks. 为什么这会威胁苹果：今天你打开 App 是因为手机主屏和 App Store 是入口，苹果因此能收「过路费」（抽成、搜索默认位授权）。如果入口变成 AI 代理 —— 你只跟代理说话，代理替你选商家 ——那么决定推荐谁、成交在哪里的权力就从操作系统转移到了代理手上，苹果的入口价值被「绕过」（disintermediation，去中介化）。同一天 Meta 涨、苹果跌，市场已经在为这个故事定价。 |
| — | Wall Street expects Meta's AI agent to shape into a new revenue engine AI 智能体 · 第 1 张术语卡 | Muse is described here as “an AI assistant that can send emails, book travel and complete transactions”. That ability to act, not chat, is why it matters to Meta's revenue and to every app it touches. 和聊天机器人差在哪：聊天机器人输出的是文字，智能体输出的是「已完成的状态」。文字可以随便说，状态改错了要赔钱——所以智能体的门槛不在模型多聪明，而在权限与责任怎么划。挑产品时可以问三个问题：它有没有明确告知对方自己是 AI？出了错谁负责？它拿到的权限能不能收回？ |
An agent is a chatbot
A chatbot answers; an agent acts and checks the result.
Agents remove the need for review
They raise it: errors compound across steps.
Agent revenue is seat-based
It is increasingly priced per task or per outcome.
· autonomous agent
· agentic workflow
· tool use
· human in the loop
· task automation
autonomous agent 自主智能体；agentic workflow 智能体工作流；tool use 工具调用；human in the loop 人工在环；task automation 任务自动化。
· agent vs assistant
· agentic vs generative
agent 会行动，assistant 只回应；agentic 强调多步执行，generative 强调生成内容。
The company is pricing its agent per task rather than per seat.
商业模式句：公司按任务而非按席位给智能体定价——rather than 是对比。
“Bank of America warns that third-party consumer agents could “change the economics of mobile commerce”; Meta'…”
“Muse is described here as “an AI assistant that can send emails, book travel and complete transactions”. That…”