litellm - 💡(How to fix) Fix [Bug]: websearch_interception not working for OpenAI provider when stream=true

curl -X 'POST' \
  'https://{litellm-host}/v1/chat/completions' \
  -H 'accept: application/json' \
  -H 'x-litellm-api-key: sk-XXXXXX' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "openai-gpt-5.1",
  "messages": [
    {
      "role": "user",
      "content": "What is the weather in San Francisco today?"
    }
  ],
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "litellm_web_search",
        "description": "Search the web for information, always include URL in citations",
        "parameters": {
          "type": "object",
          "properties": {
            "query": {
              "type": "string"
            }
          },
          "required": [
            "query"
          ]
        }
      }
    }
  ],
  "tool_choice": "auto",
  "stream": false
}' | jq

---

{
  "error": {
    "message": "litellm.BadRequestError: OpenAIException - Unknown parameter: '_websearch_interception_converted_stream'.. Received Model Group=openai-gpt-5.1\nAvailable Model Group Fallbacks=None",
    "type": "invalid_request_error",
    "param": "_websearch_interception_converted_stream",
    "code": "400"
  }
}

---