Error when trying to create assistant with model gpt-4o

API
,
1

Hello - i try to create an assistant using the following statement:

  assistant = client.beta.assistants.create(
    name="HTML Analyse Assistant",
    # instructions="You are a machine learning researcher, answer questions about the text-file which is an extract of a html-website ",
    instructions="You are a machine learning researcher, answer questions about the provided text-file",
    model="gpt-4o",
    tools=[{"type": "file_search"}],
  )

But i get this error:

openai.BadRequestError: Error code: 400 - {'error': {'message': "The requested model 'gpt-4o' does not exist.", 'type': 'invalid_request_error', 'param': 'model', 'code': 'model_not_found'}}