Issues with Generating PDF Outputs Using GPT-5 API

[AI_team]

I was previously able to generate PDFs as output when using the “assistant” model by clearly specifying it in the prompt (e.g., “Generate a PDF with this content…”). Now that I’m using the GPT-5 model with the “Response” paradigm, I can no longer get binary files as output with the same prompt. How can I achieve this with the new setup?