Elastische KI-Workflows mit Auto-GPT und Gemini-Failover-Kette erstellen

• •OpenAI API Key
• •Google Gemini API Key

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      "type": "@n8n/n8n-nodes-langchain.agent",
      "onError": "continueErrorOutput",
      "position": [
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      "parameters": {
        "text": "Only output \"test\".",
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              "name": "models",
              "type": "array",
              "value": "[\"gemini-2.5-flash\"]"
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            {
              "id": "151da1bf-a82a-40a9-bca2-a85ab48f1c5b",
              "name": "fail_count",
              "type": "number",
              "value": "={{ $('Agent Variables')?.isExecuted ? $('Agent Variables').last()?.json?.fail_count + 1 : 0 }}"
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          ]
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      "typeVersion": 3.4
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        "code": {
          "supplyData": {
            "code": "let llms = await this.getInputConnectionData('ai_languageModel', 0);\nllms.reverse(); // reverse array, so the order matches the UI elements\n\nconst llm_index = $input.item.json.fail_count;\n\nif (!Number.isInteger(llm_index)) {\n  console.log(\"'llm_index' is udefined or not a valid integer\");\n  throw new Error(\"'llm_index' is udefined or not a valid integer\");\n}\n\nif(typeof llms[llm_index] === 'undefined') {\n  console.log(`No LLM found with index ${llm_index}`);\n  throw new Error(`No LLM found with index ${llm_index}`);\n}\n\nreturn llms[llm_index];"
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      "name": "Primäres Modell",
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      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-4o",
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        "content": "### ⚙️ CONFIGURE YOUR FALLBACK CHAIN HERE ⚙️\n\nThis node selects which AI model to use based on the number of previous failures.\n\n**To set up your models:**\n1.  Add your desired AI model nodes to the canvas (OpenAI, Gemini, Anthropic, etc.).\n2.  Connect them to **THIS** node's `ai_languageModel` input.\n\n\n**IMPORTANT:** The **order** you connect them in is the order they will be tried."
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      "position": [
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      "parameters": {
        "color": 7,
        "width": 340,
        "height": 320,
        "content": "#### 📝 DEFINE YOUR PROMPT HERE\n\nEnter the prompt or task for the AI agent in this node.\n\nIt will dynamically use the models provided one-by-one from the `Fallback Models` node. If it fails, it will automatically retry with the next model in your chain."
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      "position": [
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      ],
      "parameters": {
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        "width": 400,
        "height": 320,
        "content": "#### 🔁 Loop Controller\n\nThis node manages the retry loop.\n\nIt initializes and increments a `fail_count` variable each time the `AI Agent` fails, which tells the `Fallback Models` node to try the next model in the list.\n\nNo configuration is needed here."
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      "name": "Manueller Trigger",
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