Frequently Asked Questions
常见问题
What is the best free AI tool in 2025?
2025年最好用的免费AI工具是什么？
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ChatGPT (free tier), Claude (free tier), and Ollama for local use are among the best free AI tools in 2025. Ollama lets you run powerful models like Llama 3 and Mistral completely offline on your own machine.
ChatGPT（免费版）、Claude（免费版）和本地运行的 Ollama 是2025年最好用的免费AI工具。Ollama 可以让你在自己的电脑上完全离线运行 Llama 3、Mistral 等强大模型。
What is the difference between AI tools and AI agents?
AI工具和AI智能体（Agent）有什么区别？
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AI tools are standalone applications (like ChatGPT or Midjourney) that perform specific tasks when you prompt them. AI agents are autonomous systems built with frameworks like LangChain or AutoGen that can independently plan, reason, use tools, and execute multi-step tasks without constant human input.
AI工具是独立应用程序（如ChatGPT或Midjourney），在你提示时执行特定任务。AI智能体是使用LangChain或AutoGen等框架构建的自主系统，能够独立规划、推理、使用工具并执行多步骤任务，无需持续的人工输入。
Which AI agent framework should I choose for my project?
我的项目应该选择哪个AI智能体框架？
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LangChain is best for flexible LLM pipelines and custom integrations. AutoGen excels at multi-agent conversation. CrewAI is ideal for role-based agent teams. LlamaIndex is best for RAG and document Q&A. Dify and Flowise offer no-code visual builders for beginners.
LangChain 最适合灵活的LLM管线和自定义集成；AutoGen 擅长多智能体对话；CrewAI 适合角色分工团队；LlamaIndex 最适合RAG和文档问答；Dify 和 Flowise 为初学者提供可视化无代码构建器。
Are all tools on this directory open-source?
导航中的所有工具都是开源的吗？
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Yes. All tools featured here are open-source projects hosted on GitHub. We focus on projects with 1,000+ stars to ensure community validation, active maintenance, and production-readiness.
是的。本导航收录的所有工具均为托管在GitHub上的开源项目，我们重点关注具有1000+星标的项目，以确保社区验证、活跃维护和生产可用性。