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Method: client.generate_response() (stream with client.stream_response()).

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Example

resp = client.generate_response({
    "model": "openai/gpt-4.1",
    "input": [{"role": "user", "content": [{"type": "output_text", "text": "Summarise this"}]}],
    "temperature": 0.7,
})

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Streaming

for line in client.stream_response({
    "model": "openai/gpt-4.1",
    "input": [{"role": "user", "content": [{"type": "output_text", "text": "Stream this"}]}],
    "stream": True,
}):
    print(line)

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Key parameters

  • model (required): Target model id.
  • input (required): Ordered array of input items (messages, tool calls, etc.).
  • temperature (0-2): Higher = more random.
  • top_p (0-1) / top_k (>=1): Nucleus / k-best sampling controls.
  • max_output_tokens (int): Hard cap on tokens generated per response.
  • Tools: tools (definitions), tool_choice (auto/none/specific), max_tool_calls (int), parallel_tool_calls (bool).
  • Logprobs: logprobs (bool), top_logprobs (0-20) to return per-token logprobs.
  • Output: response_format (json/text), service_tier, store (bool), stream (bool).
  • Metadata: metadata (object) for passthrough, reasoning (object) for effort hints.
  • Gateway extras: usage (bool to request usage), meta (bool to include meta block).

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Returns

ResponsesResponse 
{
  "id": "resp_123",
  "object": "response",
  "created_at": 1677652288,
  "status": "completed",
  "model": "gpt-4.1",
  "output": [
    {
      "type": "message",
      "id": "msg_123",
      "status": "completed",
      "role": "assistant",
      "content": [
        {
          "type": "output_text",
          "text": "Hello there, how may I assist you today?"
        }
      ]
    }
  ],
  "usage": {
    "input_tokens": 9,
    "output_tokens": 12,
    "total_tokens": 21
  }
}
Or newline-delimited SSE frames when stream: true: 
data: {"id":"resp_123","object":"response","created_at":1677652288,"status":"in_progress","model":"gpt-4.1","output":[{"type":"message","id":"msg_123","status":"in_progress","role":"assistant","content":[]}]}

data: {"id":"resp_123","object":"response","created_at":1677652288,"status":"in_progress","model":"gpt-4.1","output":[{"type":"message","id":"msg_123","status":"in_progress","role":"assistant","content":[{"type":"output_text","text":"Hello"}]}]}

data: {"id":"resp_123","object":"response","created_at":1677652288,"status":"completed","model":"gpt-4.1","output":[{"type":"message","id":"msg_123","status":"completed","role":"assistant","content":[{"type":"output_text","text":"Hello there, how may I assist you today?"}]}],"usage":{"input_tokens":9,"output_tokens":12,"total_tokens":21}}

data: [DONE]
Last modified on February 17, 2026