system fingerprint is None for some models, but not others

[elisa-abridge]

Per the documentation here, the OpenAI API should return a system_fingerprint. However, when calling any model that is not gpt-3.5-turbo-1106 or gpt-4-1106-preview, the system_fingerprint is always None.

The link above doesn't mention any model requirement.

Please update the code to return a system fingerprint for earlier models, or else document in the API which models are actually supported.

To Reproduce

copy and paste notebook here
change this line to an older model:
GPT_MODEL = "gpt-3.5-turbo-1106"
For example:
GPT_MODEL = "gpt-3.5-turbo-0613"

the system_fingerprint returned is None

OS-Ubuntu
Python version- Python v3.10
Library version- openai v1.6.1

[jberryman]

fwiw with the python sdk I don't get a fingerprint with gpt-3.5-turbo-1106. I do get one with gpt-4-turbo