使用多模型问答工具节省RAG工作流成本
中级
这是一个Building Blocks, AI领域的自动化工作流，包含 13 个节点。主要使用 FormTrigger, Agent, ChatTrigger, LmChatOpenAi, ToolVectorStore 等节点，结合人工智能技术实现智能自动化。 使用多模型问答工具节省RAG工作流成本
前置要求
- •OpenAI API Key
使用的节点 (13)
工作流预览
可视化展示节点连接关系，支持缩放和平移
导出工作流
复制以下 JSON 配置到 n8n 导入，即可使用此工作流
{
"meta": {
"instanceId": "257476b1ef58bf3cb6a46e65fac7ee34a53a5e1a8492d5c6e4da5f87c9b82833",
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "83ed351e-90e8-458f-a01b-73001ef1800f",
"name": "在此处上传您的文件",
"type": "n8n-nodes-base.formTrigger",
"position": [
220,
-120
],
"webhookId": "82848bc4-5ea2-4e5a-8bb6-3c09b94a8c5d",
"parameters": {
"options": {},
"formTitle": "Upload your data to test RAG",
"formFields": {
"values": [
{
"fieldType": "file",
"fieldLabel": "Upload your file(s)",
"requiredField": true,
"acceptFileTypes": ".pdf, .csv"
}
]
}
},
"typeVersion": 2.2
},
{
"id": "26d63e24-2592-41f9-9b4b-edab81e99f21",
"name": "Embeddings OpenAI",
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"position": [
860,
460
],
"parameters": {
"options": {}
},
"credentials": {
"openAiApi": {
"id": "14",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "3a69c8a7-bf95-4de2-84b0-ae2cc3d2e4e7",
"name": "默认数据加载器",
"type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
"position": [
660,
40
],
"parameters": {
"options": {},
"dataType": "binary"
},
"typeVersion": 1.1
},
{
"id": "0b42832b-c9e8-4627-b36c-94fc5e242b33",
"name": "便签",
"type": "n8n-nodes-base.stickyNote",
"position": [
-320,
-180
],
"parameters": {
"color": 4,
"width": 440,
"height": 300,
"content": "### 自述文件"
},
"typeVersion": 1
},
{
"id": "f902ab8f-4620-4a95-86f7-c5857c4d6c4f",
"name": "便签1",
"type": "n8n-nodes-base.stickyNote",
"position": [
160,
-180
],
"parameters": {
"color": 7,
"width": 700,
"height": 460,
"content": "### 📚 加载数据流程"
},
"typeVersion": 1
},
{
"id": "0f4185ea-d7a9-44a9-a824-98f9dc2c2a5d",
"name": "将数据插入存储",
"type": "@n8n/n8n-nodes-langchain.vectorStoreInMemory",
"position": [
400,
-120
],
"parameters": {
"mode": "insert",
"memoryKey": {
"__rl": true,
"mode": "list",
"value": "vector_store_key",
"cachedResultName": "vector_store_key"
}
},
"typeVersion": 1.2
},
{
"id": "ce86b41b-7e1b-458f-ab13-d6b187854ae8",
"name": "查询数据工具",
"type": "@n8n/n8n-nodes-langchain.vectorStoreInMemory",
"position": [
1300,
200
],
"parameters": {
"memoryKey": {
"__rl": true,
"mode": "list",
"value": "vector_store_key"
}
},
"typeVersion": 1.2
},
{
"id": "0039537b-558c-4fe8-9716-f8aa13676f4a",
"name": "AI 代理",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
1280,
-140
],
"parameters": {
"options": {}
},
"typeVersion": 2
},
{
"id": "2669a65e-f0f3-45aa-95c0-621b15a4fc67",
"name": "当收到聊天消息时",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
1060,
-140
],
"webhookId": "4091fa09-fb9a-4039-9411-7104d213f601",
"parameters": {
"options": {}
},
"typeVersion": 1.1
},
{
"id": "3d1b3f5a-bc35-4739-a618-9c85820d39a0",
"name": "便签2",
"type": "n8n-nodes-base.stickyNote",
"position": [
940,
-180
],
"parameters": {
"color": 7,
"width": 820,
"height": 520,
"content": "### 🐕 2. 检索器流程"
},
"typeVersion": 1
},
{
"id": "6553a758-c655-4196-88be-9d93187f9c7b",
"name": "使用向量存储回答问题",
"type": "@n8n/n8n-nodes-langchain.toolVectorStore",
"position": [
1440,
60
],
"parameters": {
"description": "数据包含自定义知识"
},
"typeVersion": 1.1
},
{
"id": "d43cf585-4192-4f53-9532-4677923289ba",
"name": "昂贵模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
1060,
80
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4.1",
"cachedResultName": "gpt-4.1"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "14",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "18dcc49d-9ce0-4746-8135-7e4c77cfa501",
"name": "廉价模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
1600,
200
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4.1-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "14",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
}
],
"pinData": {},
"connections": {
"Cheap Model": {
"ai_languageModel": [
[
{
"node": "Answer questions with a vector store",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Expensive model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Query Data Tool": {
"ai_tool": [
[]
],
"ai_vectorStore": [
[
{
"node": "Answer questions with a vector store",
"type": "ai_vectorStore",
"index": 0
}
]
]
},
"Embeddings OpenAI": {
"ai_embedding": [
[
{
"node": "Insert Data to Store",
"type": "ai_embedding",
"index": 0
},
{
"node": "Query Data Tool",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Default Data Loader": {
"ai_document": [
[
{
"node": "Insert Data to Store",
"type": "ai_document",
"index": 0
}
]
]
},
"Upload your file here": {
"main": [
[
{
"node": "Insert Data to Store",
"type": "main",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Answer questions with a vector store": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
}
}
}常见问题
如何使用这个工作流？
复制上方的 JSON 配置代码，在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」，粘贴配置后根据需要修改凭证设置即可。
这个工作流适合什么场景？
中级 - 构建模块, 人工智能
需要付费吗？
本工作流完全免费，您可以直接导入使用。但请注意，工作流中使用的第三方服务（如 OpenAI API）可能需要您自行付费。
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