Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library

Describe the bug

OpenAI allows us to use verbosity param with both Responses and Completions endpoints.

curl --request POST \
--url https://api.openai.com/v1/chat/completions \
--header "Authorization: Bearer $OPENAI_API_KEY" \
--header 'Content-type: application/json' \
--data '{
  "model": "gpt-5",
  "messages": [
    { "role": "user", "content": "What is the answer to the ultimate question of life, the universe, and everything?" }
  ],
  "verbosity": "low"
}'

This works fine as a standalone request, but library does not accept verbosity as a valid parameter in chat.completions.create()

To Reproduce

chat_completion = client.chat.completions.create(
    messages=[
        {"role": "user", "content": "What is the answer to the ultimate question of life, the universe, and everything?"}
    ],
    model="gpt-5",
    verbosity="low" 
)

this should work, not throw

create() got an unexpected keyword argument 'verbosity'

OS

linux

Python version

Python v3.9

Library version

openai v1.106.0