Nano Banana grátis no n8n

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  "name": "My workflow 31",
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      "parameters": {
        "operation": "toBinary",
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    {
      "parameters": {
        "path": "pov",
        "formTitle": "Describe the image you would like to generate",
        "formDescription": "=Describe the Scence",
        "formFields": {
          "values": [
            {
              "fieldLabel": "User Input",
              "placeholder": "You Wake Up During the Black Plague (1351)",
              "requiredField": true
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      "webhookId": "a35eb005-f795-4c85-9d00-0fe9797cb509",
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    {
      "parameters": {
        "content": "## Generate Description of the Image",
        "height": 340,
        "width": 500,
        "color": 4
      },
      "type": "n8n-nodes-base.stickyNote",
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      "parameters": {
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          "__rl": true,
          "value": "gpt-4o",
          "mode": "list",
          "cachedResultName": "GPT-4O"
        },
        "messages": {
          "values": [
            {
              "content": "=\n📌 Task:\nYou are an advanced AI specializing in transforming a short user-provided description into a hyper-realistic, cinematic first-image prompt. This single prompt is optimized for both text-to-image and text-to-video AI models such as Flux, MidJourney, Stable Diffusion, Runway Gen-3 Alpha, and Pika Labs.\n\nuser-provided description: {{ $json['User Input'] }}\n\nFINAL REMINDER:\n\n- Output MUST be less than 950 characters \n- Output MUST be one json:\n    { \"prompt\": \"Generated text output here...\" }\n"
            }
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        },
        "jsonOutput": true,
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.openAi",
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      "id": "bcafe244-3ffe-4230-9829-cf6a232e8c2b",
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          "id": "zE5O89L0JjnRwfPU",
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    },
    {
      "parameters": {
        "content": "## Create Image with Nano Banana for FREE",
        "height": 340,
        "width": 584,
        "color": 5
      },
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        "jsonBody": "={\n  \"model\": \"google/gemini-2.5-flash-image-preview:free\",\n  \"modalities\": [\"image\", \"text\"],\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"{{ $json.message.content.prompt }}\"\n    }\n  ]\n}\n",
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      "name": "HTTP Request",
      "credentials": {
        "openRouterApi": {
          "id": "NrrkWrl89ut7kmrh",
          "name": "OpenRouter account 2"
        }
      }
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
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              "id": "0d3e1ea2-9386-47bf-8f8a-cce7f349dbe5",
              "name": "=data",
              "value": "={{$json[\"choices\"][0][\"message\"][\"images\"][0][\"image_url\"][\"url\"]}}",
              "type": "string"
            },
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              "name": "=base",
              "value": "={{$json[\"choices\"][0][\"message\"][\"images\"][0][\"image_url\"][\"url\"].split(\",\")[1]}}",
              "type": "string"
            },
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              "name": "mime",
              "value": "={{$json[\"choices\"][0][\"message\"][\"images\"][0][\"image_url\"][\"url\"].match(/^data:([^;]+)/)[1]}}",
              "type": "string"
            },
            {
              "id": "7de58815-fa11-46ba-acb4-eb4563120218",
              "name": "fileName",
              "value": ".png",
              "type": "string"
            }
          ]
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      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
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  ],
  "pinData": {},
  "connections": {
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    },
    "n8n Form Trigger": {
      "main": [
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          {
            "node": "Generate Prompt",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Generate Prompt": {
      "main": [
        [
          {
            "node": "HTTP Request",
            "type": "main",
            "index": 0
          }
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    },
    "HTTP Request": {
      "main": [
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          {
            "node": "Edit Fields1",
            "type": "main",
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    "Edit Fields1": {
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            "node": "Convert to File1",
            "type": "main",
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    "executionOrder": "v1"
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    "templateCredsSetupCompleted": true,
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  "id": "mPWzoBWsPL2sTXsJ",
  "tags": []
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