general assistantChatGPT: uses, limits and practical trial
ChatGPT can work with documents, spreadsheets and presentations uploaded to a conversation. It can help compare, summarize or analyze them. Supported formats, limits and capabilities depend on the plan and account settings.
Sources consulted on · OpenAI
Suitable tasks
Prepare a note from two public reports or explore a table with known totals. Specify columns, units, dates and passages to preserve. Writing tasks and calculation tasks require different checks.
Limits and checks
Successful uploading does not prove complete understanding. Check tables, appendices and information carried by images. Review the account’s data conditions before uploading business documents.
A repeatable trial
Use two public versions of one document. Identify five changes yourself, then request a comparison with supporting passages. Add a small table with a known total and request the calculation steps. Record missed changes, unclear references and numeric errors.
How to decide
Keep the workflow when each claim can be traced and calculations reproduced. Compare a source-centered tool for a maintained corpus and local execution for data that cannot be transmitted.
Frequently asked questions
Does uploading a PDF guarantee its images are read?
No. Check your account’s capabilities and separately verify charts, scans and tables.
How can I avoid misleading totals?
Specify units, filters and excluded rows, then recalculate using the original data.
What should I keep after testing?
Original files, the prompt, response, date and necessary corrections.
Official documentation and scope
The overview relies on the documents below. The trial and decision criteria are editorial advice, not benchmark results. Prices, quotas and models are not fixed here: check the current offer before purchase.