Example JSON Response

{
  "choices": [
    {
      "index": 0,
      "delta": {
        "content": "",                  // reply content field
        "reasoning_content": "more",    // thinking information field
        "role": "assistant"
      }
    }
  ],
  "created": 1741668925,
  "id": "021741668925429745f35aecd61d8759727392a4826173c6db921",
  "model": "deepseek-reasoner",          // reasoning model
  "service_tier": "default",
  "object": "chat.completion.chunk",
  "usage": null
}

Field Explanation

reasoning_content → the content of the thinking information field.

content → the reply content field for user-facing output.

Reasoning model (e.g., Gemini Reasoner) will return reasoning content in reasoning_content.

Reverse model will wrap reasoning output with <think> tags:

<think>
  Thinking content
</think>

AI Return Field: Thinking Related

Example JSON Response#

Field Explanation#

Example JSON Response

Field Explanation