Hey guys recently gpt 3 5 turbo started

Hey guys, recently gpt-3.5-turbo started to make up too much stuff and 'suppose' too many times.

Maybe you guys are aware of what has changed recently, and maybe have suggesstions for me?

Here's what I am using:

llm = OpenAI(model="gpt-3.5-turbo", temperature=0)
service_context = ServiceContext.from_defaults(llm=llm, chunk_size=1024, callback_manager=callback_manager)
set_global_service_context(service_context)
response_synthesizer = get_response_synthesizer(
response_mode='refine'
)

memory = ChatMemoryBuffer.from_defaults(token_limit=2000)
chat_engine = testrail_project_index.as_chat_engine(
chat_mode="context",
memory=memory,
service_context = service_context,
refine_template=DEFAULT_REFINE_PROMPT,
system_prompt=(f'Your name is Mantis, who assisting only with questions related to {project_name}. You are able to have normal interactions as long as they don't discuss something outside the context. Only talk about a product's {project_name} based on its test cases through data provided to you in context. If there is something not related to the context, you explain that you can't answer.'),
response_synthesizer=response_synthesizer,
similarity_top_k=5
)