Send files to completion api

Frustrated with not finding an OpenAPI by which I could get a summary of a file, I decided to try the Playground - Assistants. I uploaded a file, which required the gpt-3.5-turbo-1106 model. I then had say: “I need a summary of the report contained in file ”. It ran for quite a while, going through Create a thread, Run the thread, Run queued, Run in_progress and then Run expired 5894 tokens (5832 in, 62 out). I see no explanation for expired, but in the “Response” I do see “tool_calls” of “type”: “retrieval”. AND I don’t think that “retrieval” does what I need to do, i.e., summarize my report.