Open Responses API doesn't accept "output_text" as an input Item

{
  "model": "gemma-4-26b-a4b-it",
  "instructions": "These are scanned hand-written notes. Combine the notes, but do not reorder or change the wording of the notes except for the footnotes and endnotes. ",
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      "role": "assistant",
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      "content": [
        {
          "text": "text 1",
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[
  {
    "role": "system",
    "content": "These are scanned hand-written notes. Combine the notes, but do not reorder or change the wording of the notes except for the footnotes and endnotes. "
  }
]

{
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  "object": "response",
  "created_at": 1790610865,
  "completed_at": 1790610910,
  "status": "completed",
  "model": "gemma-4-26b-a4b-it",
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      "status": "completed",
      "role": "assistant",
      "content": [
        {
          "type": "output_text",
          "text": "Please provide the scanned hand-written notes (by uploading the images or providing the text). \n\nOnce you provide them, I will combine them according to your exact constraints:\n1. **No reordering:** I will keep the notes in their original sequence.\n2. **No wording changes:** I will not change a single word in the body of the notes.\n3. **Footnotes/Endnotes exception:** I will only adjust the footnotes and endnotes to ensure they are correctly placed or formatted according to your requirements.",
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        }
      ],
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      "summary": []
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  ],
  "error": null,
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  "previous_response_id": null,
  "instructions": "These are scanned hand-written notes. Combine the notes, but do not reorder or change the wording of the notes except for the footnotes and endnotes. ",
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  "truncation": "auto",
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    "output_tokens": 1546,
    "total_tokens": 1589,
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  },
  "metadata": {},
  "store": true,
  "background": false,
  "service_tier": "default",
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  "prompt_cache_key": null
}