Yes, I’ve noticed the same thing with Mini hallucinating almost everything from reading a PDF stored in a vector store to a json schema structured output.
Simple text conversion isn’t an option because of how irregular the PDF data is.
I have had mini successfully perform a similar operation—the difference is now that I have the data lookup and Structured Output as response_format in a single step. While I haven’t been able to test this, maybe having both in a single step is too much for mini.
Meanwhile, I’ve had gpt-4o-2024-08-06 be able to do both in a single step.