Setting parallel_tool_calls = False doesn't work in the Chat completions API

API Bugs
1

Supplying parallel_tool_calls=False returns this error for chat completions:

An internal error occurred: Completions.create() got an unexpected keyword argument ‘parallel_tool_calls’. Please try again later.

It’s specified in the API, so why doesn’t it work?

All the other ones work as intended (tools, tool_choice, etc)

2

make sure you’re updated to the latest version pip install -U openai and using the current API:

r = openai.OpenAI().chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": user_message}],
    tools=[Function.model_json_schema()],
    tool_choice='required',
    parallel_tool_calls=False
)
4

It is only working with GPT-4 Model.

Not working with any other model.

I tested it on playground