Create custom prompt in AI Builder to read scanned hardcopy receipts

I'm created a custom prompt in AI builder using GPT-5 chat model to read a one-page PDF file. This file contains multiple small receipts from neighborhood supermarkets and restaurants. When I tested the prompt and upload the file in AI builder, it cannot accurately read the invoice number of certain receipts. However, when I tested the Microsoft 365 Copilot using the same prompt, same file and same model (GPT-5 chat), it can accurately return me all the information that I need. May I know why AI Builder is unable to return the same accurate result as M365 Copilot, given that all inputs are the same? What adjustments should I make in AI Builder to accurately return all details from my one-page PDF file? 

Thank you.