Create Model Response (Control Thinking Length)

POST https://www.kkiai.com/v1/responses

https://platform.openai.com/docs/api-reference/responses/create
Some OpenAI models only support Response format, such as o3-pro, codex-mini-latest

Request Parameters

Authorization

Add the Authorization parameter in the Header, with its value being the Token concatenated after Bearer

Example: Authorization: Bearer ********************

Header Parameters

Parameter Name	Type	Required	Description	Example
Content-Type	string	Required		application/json
Accept	string	Required		application/json
Authorization	string	Optional		Bearer {{YOUR_API_KEY}}

Body Parameters (application/json)

Parameter Name	Type	Required	Description
model	string	Optional	The ID of the model to use. For detailed information about which models can be used with the Chat API, please refer to the model endpoint compatibility table.
input	string	Optional
reasoning	object	Optional	Description of the chain of thought used by the reasoning model when generating responses.
└ effort	string	Optional	Currently supported values are minimal, low, medium, and high. Reducing reasoning effort can speed up response time and reduce tokens used for reasoning in the response. Default is medium

Request Example

{
    "model": "gpt-5.1",
    "input": [
        {
            "role": "user",
            "content": "Write a one-sentence bedtime story about a unicorn."
        }
    ],
    "reasoning": {
      "effort": "high"
    }
  }

cURL Example

curl --location --request POST 'https://www.kkiai.com/v1/responses' \
--header 'Accept: application/json' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "gpt-5.1",
    "input": [
        {
            "role": "user",
            "content": "Write a one-sentence bedtime story about a unicorn."
        }
    ],
    "reasoning": {
      "effort": "high"
    }
  }'

Response

🟢 200 OK

Response Body

Parameter Name	Type	Required	Description
id	string	Required
object	string	Required
created	integer	Required
choices	array[object]	Required
└ index	integer	Optional
└ message	object	Optional
└ finish_reason	string	Optional
usage	object	Required
└ prompt_tokens	integer	Required
└ completion_tokens	integer	Required
└ total_tokens	integer	Required

Response Example

{
    "id": "chatcmpl-123",
    "object": "chat.completion",
    "created": 1677652288,
    "choices": [
        {
            "index": 0,
            "message": {
                "role": "assistant",
                "content": "\n\nHello there, how may I assist you today?"
            },
            "finish_reason": "stop"
        }
    ],
    "usage": {
        "prompt_tokens": 9,
        "completion_tokens": 12,
        "total_tokens": 21
    }
}