Unknown parameter: 'verbosity' (ed: Responses API)

API Bugs
11

Verbosity parameter is a property of the “text” API parameter object.

POST https://api.openai.com/v1/responses

{
  "model": "gpt-5-mini-2025-08-07",
  "input": [
    {
      "role": "developer",
      "content": [
        {
          "type": "input_text",
          "text": "Help the user!"
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "input_text",
          "text": "I need help!"
        }
      ]
    }
  ],
  "text": {
    "format": {
      "type": "text"
    },
    "verbosity": "low"
  },
  "reasoning": {
    "effort": "minimal",
  },
  "store": false
}

from openai import OpenAI
client = OpenAI()

response = client.responses.create(
  model="gpt-5-mini-2025-08-07",
  input=[
    {
      "role": "developer",
      "content": [
        {
          "type": "input_text",
          "text": "Help the user!"
        }
      ]
    },
    {
      "role": "user",
      "content": [
        {
          "type": "input_text",
          "text": "I need help!"
        }
      ]
    }
  ],
  text={
    "format": {
      "type": "text"
    },
    "verbosity": "low"
  },
  reasoning={
    "effort": "minimal",
  },
  store=False
)

I hope the working “Responses” call clarifies things a bit.

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