I assume what you put in is complete fabrication of a model number just for the sake of the forum, including a period in the name that doesn’t belong.
It also hints that you are using Azure or got the example from there. Where you should verify the model name is a deployed fine-tune model and give it a unique deployment id for identification.
Fine-tune models on OpenAI are formatted like:
ft:gpt-3.5-turbo-1106:my_org::KKJJLLMm
ChatCompletionChunk(id='chatcmpl-1234567890', choices=[Choice(delta=ChoiceDelta(content=' is', function_call=None, role=None, tool_calls=None), finish_reason=None, index=0, logprobs=None)], created=1708740058, model='ft:gpt-3.5-turbo-1106:my_org::KKJJLLMm', object='chat.completion.chunk', system_fingerprint='fp_811d5fcad5')
ChatCompletionChunk(id='chatcmpl-1234567890', choices=[Choice(delta=ChoiceDelta(content=' a', function_call=None, role=None, tool_calls=None), finish_reason=None, index=0, logprobs=None)], created=1708740058, model='ft:gpt-3.5-turbo-1106:my_org::KKJJLLMm', object='chat.completion.chunk', system_fingerprint='fp_811d5fcad5')
ChatCompletionChunk(id='chatcmpl-1234567890', choices=[Choice(delta=ChoiceDelta(content=' test', function_call=None, role=None, tool_calls=None), finish_reason=None, index=0, logprobs=None)], created=1708740058, model='ft:gpt-3.5-turbo-1106:my_org::KKJJLLMm', object='chat.completion.chunk', system_fingerprint='fp_811d5fcad5')
ChatCompletionChunk(id='chatcmpl-1234567890', choices=[Choice(delta=ChoiceDelta(content=None, function_call=None, role=None, tool_calls=None), finish_reason='stop', index=0, logprobs=None)], created=1708740058, model='ft:gpt-3.5-turbo-1106:my_org::KKJJLLMm', object='chat.completion.chunk', system_fingerprint='fp_811d5fcad5')
Works fine.