How to use OpenAI Responses API with WebSocket
OpenAI has support for web sockets for their Responses API.
This helps to improve the latency by avoiding unwanted handshakes that is involved in HTTP requests.
The Responses API supports a WebSocket mode for long-running, tool-call-heavy workflows. In this mode, you keep a persistent connection to /v1/responses and continue each turn by sending only new input items plus previous_response_id.
Example Snippet
from websocket import create_connection
import json
import os
ws = create_connection(
"wss://api.openai.com/v1/responses",
header=[
f"Authorization: Bearer {os.environ['OPENAI_API_KEY']}",
],
)
ws.send(
json.dumps(
{
"type": "response.create",
"model": "gpt-5.2",
"store": False,
"input": [
{
"type": "message",
"role": "user",
"content": [{"type": "input_text", "text": "Find fizz_buzz()"}],
}
],
"tools": [],
}
)
)
Reference
